--- title: "GET /udl/orbitdetermination" method: GET path: "/udl/orbitdetermination" tags: ["Orbit Determination"] --- # GET /udl/orbitdetermination `GET /udl/orbitdetermination` ## Request - Base URL: `https://unifieddatalibrary.com` - URL: `https://unifieddatalibrary.com/udl/orbitdetermination` - Auth: none declared Service operation to dynamically query data by a variety of query parameters not specified in this API documentation. See the queryhelp operation (`/udl//queryhelp`) for more details on valid/required query parameter information. ## Query parameters - `idOnOrbit` string - `startTime` string, date-time - `firstResult` integer - `maxResults` integer ## Response `200` OK - OrbitDeterminationAbridged[] - `id` string: Unique identifier of the record, auto-generated by the system. - `classificationMarking` string, required: Classification marking of the data in IC/CAPCO Portion-marked format. - `startTime` string, date-time, required: Start time for OD solution in ISO 8601 UTC datetime format, with microsecond precision. - `endTime` string, date-time, required: End time for OD solution in ISO 8601 UTC datetime format, with microsecond precision. - `idOnOrbit` string: Unique identifier of the target satellite on-orbit object. This ID can be used to obtain additional information on an OnOrbit object using the 'get by ID' operation (e.g. /udl/onorbit/{id}). For example, the OnOrbit with idOnOrbit = 25544 would be queried as /udl/onorbit/25544. - `origObjectId` string: Optional identifier provided by the OD source to indicate the target on-orbit object of this OD solution. This may be an internal identifier and not necessarily map to a valid satellite number. - `satNo` integer: Satellite/Catalog number of the target on-orbit object. - `aprioriIdElset` string: Identifier of the element set used to seed this OD solution. This ID can be used to obtain additional information on an Elset object using the 'get by ID' operation (e.g. /udl/elset/{id}). For example, the Elset with idElset = abc would be queried as /udl/elset/abc. - `aprioriElset` object: An element set is a collection of Keplerian orbital elements describing an orbit of a particular satellite. The data is used along with an orbit propagator in order to predict the motion of a satellite. The element set, or elset for short, consists of identification data, the classical elements and drag parameters. - `idElset` string: Unique identifier of the record, auto-generated by the system. - `classificationMarking` string, required: Classification marking of the data in IC/CAPCO Portion-marked format. - `satNo` integer: Satellite/catalog number of the target on-orbit object. - `epoch` string, date-time, required: Elset epoch time in ISO 8601 UTC format, with microsecond precision. - `meanMotion` number, double: Mean motion is the angular speed required for a body to complete one orbit, assuming constant speed in a circular orbit which completes in the same time as the variable speed, elliptical orbit of the actual body. Measured in revolutions per day. - `idOnOrbit` string: Unique identifier of the satellite on-orbit object, if correlated. For the public catalog, the idOnOrbit is typically the satellite number as a string, but may be a UUID for analyst or other unknown or untracked satellites. - `uct` boolean: Boolean indicating this Elset was unable to be correlated to a known object. This flag should only be set to true by data providers after an attempt to correlate to an on-orbit object was made and failed. If unable to correlate, the 'origObjectId' field may be populated with an internal data provider specific identifier. - `eccentricity` number, double: The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit, and greater than 1 is a hyperbolic escape orbit. - `inclination` number, double: The angle between the equator and the orbit when looking from the center of the Earth. If the orbit went exactly around the equator from left to right, then the inclination would be 0. The inclination ranges from 0 to 180 degrees. - `raan` number, double: Right ascension of the ascending node, or RAAN is the angle as measured in degrees eastwards (or, as seen from the north, counterclockwise) from the First Point of Aries to the ascending node, which is where the orbit crosses the equator when traveling north. - `argOfPerigee` number, double: The argument of perigee is the angle in degrees formed between the perigee and the ascending node. If the perigee would occur at the ascending node, the argument of perigee would be 0. - `meanAnomaly` number, double: Where the satellite is in its orbital path. The mean anomaly ranges from 0 to 360 degrees. The mean anomaly is referenced to the perigee. If the satellite were at the perigee, the mean anomaly would be 0. - `revNo` integer: The current revolution number. The value is incremented when a satellite crosses the equator on an ascending pass. - `bStar` number, double: The drag term for SGP4 orbital model, used for calculating decay constants for altitude, eccentricity etc, measured in inverse earth radii. - `agom` number, double: AGOM, expressed in m^2/kg, is the value of the (averaged) object Area times the solar radiation pressure coefficient(Gamma) over the object Mass. Applicable only with ephemType4. - `ballisticCoeff` number, double: Ballistic coefficient, in m^2/kg. Applicable only with ephemType4. - `meanMotionDot` number, double: 1st derivative of the mean motion with respect to time. Units are revolutions per day squared. - `meanMotionDDot` number, double: 2nd derivative of the mean motion with respect to time. Units are revolutions per day cubed. - `semiMajorAxis` number, double: The sum of the periapsis and apoapsis distances divided by two. For circular orbits, the semimajor axis is the distance between the centers of the bodies, not the distance of the bodies from the center of mass. Units are kilometers. - `period` number, double: Period of the orbit equal to inverse of mean motion, in minutes. - `apogee` number, double: The orbit point furthest from the center of the earth in kilometers. If not provided, apogee will be computed from the TLE according to the following. Using mu, the standard gravitational parameter for the earth (398600.4418), semi-major axis A = (mu/(n * 2 * pi/(24*3600))^2)(1/3). Using semi-major axis A, eccentricity E, apogee = (A * (1 + E)) in km. Note that the calculations are for computing the apogee radius from the center of the earth, to compute apogee altitude the radius of the earth should be subtracted (6378.135 km). - `perigee` number, double: The orbit point nearest to the center of the earth in kilometers. If not provided, perigee will be computed from the TLE according to the following. Using mu, the standard gravitational parameter for the earth (398600.4418), semi-major axis A = (mu/(n * 2 * pi/(24*3600))^2)(1/3). Using semi-major axis A, eccentricity E, perigee = (A * (1 - E)) in km. Note that the calculations are for computing the perigee radius from the center of the earth, to compute perigee altitude the radius of the earth should be subtracted (6378.135 km). - `origObjectId` string: Optional identifier provided by elset source to indicate the target onorbit object of this elset. This may be an internal identifier and not necessarily map to a valid satellite number. - `idOrbitDetermination` string: Unique identifier of the OD solution record that produced this elset. This ID can be used to obtain additional information on an OrbitDetermination object using the 'get by ID' operation (e.g. /udl/orbitdetermination/{id}). For example, the OrbitDetermination with idOrbitDetermination = abc would be queried as /udl/orbitdetermination/abc. - `line1` string: Read only derived/generated line1 of a legacy TLE (two line element set) format, ignored on create/edit operations. - `line2` string: Read only derived/generated line2 of a legacy TLE (two line element set) format, ignored on create/edit operations. - `descriptor` string: Optional source-provided and searchable metadata or descriptor of the data. - `createdAt` string, date-time: Time the row was created in the database, auto-populated by the system. - `createdBy` string: Application user who created the row in the database, auto-populated by the system. - `origin` string: Originating system or organization which produced the data, if different from the source. The origin may be different than the source if the source was a mediating system which forwarded the data on behalf of the origin system. If null, the source may be assumed to be the origin. - `sourceDL` string: The source data library from which this record was received. This could be a remote or tactical UDL or another data library. If null, the record should be assumed to have originated from the primary Enterprise UDL. - `source` string, required: Source of the data. - `dataMode` 'REAL' | 'TEST' | 'SIMULATED' | 'EXERCISE', required: Indicator of whether the data is REAL, TEST, EXERCISE, or SIMULATED data: REAL: Data collected or produced that pertains to real-world objects, events, and analysis. TEST: Specific datasets used to evaluate compliance with specifications and requirements, and for validating technical, functional, and performance characteristics. EXERCISE: Data pertaining to a government or military exercise. The data may include both real and simulated data. SIMULATED: Synthetic data generated by a model to mimic real-world datasets. - `algorithm` string: Optional algorithm used to produce this record. - `transactionId` string: Optional identifier to track a commercial or marketplace transaction executed to produce this data. - `ephemType` integer: The ephemeris type associated with this TLE: 0: SGP (or SGP4 with Kozai mean motion) 1: SGP (Kozai mean motion) 2: SGP4 (Brouver mean motion) 3: SDP4 4: SGP4-XP 5: SDP8 6: SP (osculating mean motion) - `origNetwork` string: The originating source network on which this record was created, auto-populated by the system. - `aprioriIdStateVector` string: Identifier of the state vector used to seed this OD solution. This ID can be used to obtain additional information on a StateVector object using the 'get by ID' operation (e.g. /udl/statevector/{id}). For example, the StateVector with idStateVector = abc would be queried as /udl/statevector/abc. - `aprioriStateVector` object: This service provides operations for querying and manipulation of state vectors for OnOrbit objects. State vectors are cartesian vectors of position (r) and velocity (v) that, together with their time (epoch) (t), uniquely determine the trajectory of the orbiting body in space. J2000 is the preferred coordinate frame for all state vector positions/velocities in UDL, but in some cases data may be in another frame depending on the provider and/or datatype. Please see the 'Discover' tab in the storefront to confirm coordinate frames by data provider. - `idStateVector` string: Unique identifier of the record, auto-generated by the system. - `classificationMarking` string, required: Classification marking of the data in IC/CAPCO Portion-marked format. - `epoch` string, date-time, required: Time of validity for state vector in ISO 8601 UTC datetime format, with microsecond precision. - `pedigree` string: The pedigree of state vector, or methods used for its generation to include state update/orbit determination, propagation from another state, or a state from a calibration satellite (e.g. ORBIT_UPDATE, PROPAGATION, CALIBRATION, CONJUNCTION, FLIGHT_PLAN). - `idOnOrbit` string: Unique identifier of the satellite on-orbit object, if correlated. For the public catalog, the idOnOrbit is typically the satellite number as a string, but may be a UUID for analyst or other unknown or untracked satellites. - `satNo` integer: Satellite/Catalog number of the target OnOrbit object. - `origObjectId` string: Optional identifier provided by state vector source to indicate the target onorbit object of this state vector. This may be an internal identifier and not necessarily map to a valid satellite number. - `idOrbitDetermination` string: Unique identifier of the OD solution record that produced this state vector. This ID can be used to obtain additional information on an OrbitDetermination object using the 'get by ID' operation (e.g. /udl/orbitdetermination/{id}). For example, the OrbitDetermination with idOrbitDetermination = abc would be queries as /udl/orbitdetermination/abc. - `msgTs` string, date-time: Time when message was generated in ISO 8601 UTC format with microsecond precision. - `uct` boolean: Boolean indicating this state vector was unable to be correlated to a known object. This flag should only be set to true by data providers after an attempt to correlate to an OnOrbit object was made and failed. If unable to correlate, the 'origObjectId' field may be populated with an internal data provider specific identifier. - `xpos` number, double: Cartesian X position of the target, in kilometers, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `ypos` number, double: Cartesian Y position of the target, in kilometers, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `zpos` number, double: Cartesian Z position of the target, in kilometers, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `xvel` number, double: Cartesian X velocity of target, in kilometers/second, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `yvel` number, double: Cartesian Y velocity of target, in kilometers/second, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `zvel` number, double: Cartesian Z velocity of target, in kilometers/second, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `xaccel` number, double: Cartesian X acceleration of target, in kilometers/second^2, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `yaccel` number, double: Cartesian Y acceleration of target, in kilometers/second^2, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `zaccel` number, double: Cartesian Z acceleration of target, in kilometers/second^2, in the specified referenceFrame. If referenceFrame is null then J2K should be assumed. - `referenceFrame` 'J2000' | 'EFG/TDR' | 'ECR/ECEF' | 'TEME' | 'ITRF' | 'GCRF': The reference frame of the cartesian orbital states. If the referenceFrame is null it is assumed to be J2000. - `cov` number[]: Covariance matrix, in kilometer and second based units, in the specified covReferenceFrame. If the covReferenceFrame is null it is assumed to be J2000. The array values (1-21) represent the lower triangular half of the position-velocity covariance matrix. The size of the covariance matrix is dynamic, depending on whether the covariance for position only or position & velocity. The covariance elements are position dependent within the array with values ordered as follows: ``` x y z x' y' z' x 1 y 2 3 z 4 5 6 x' 7 8 9 10 y' 11 12 13 14 15 z' 16 17 18 19 20 21 ``` The cov array should contain only the lower left triangle values from top left down to bottom right, in order. If additional covariance terms are included for DRAG, SRP, and/or THRUST, the matrix can be extended with the following order of elements: ``` x y z x' y' z' DRG SRP THR DRG 22 23 24 25 26 27 28 SRP 29 30 31 32 33 34 35 36 THR 37 38 39 40 41 42 43 44 45 ``` - `covReferenceFrame` 'J2000' | 'UVW' | 'EFG/TDR' | 'ECR/ECEF' | 'TEME' | 'GCRF': The reference frame of the covariance matrix elements. If the covReferenceFrame is null it is assumed to be J2000. - `covMethod` string: The method used to generate the covariance during the orbit determination (OD) that produced the state vector, or whether an arbitrary, non-calculated default value was used (CALCULATED, DEFAULT). - `eqCov` number[]: The covariance matrix values represent the lower triangular half of the covariance matrix in terms of equinoctial elements. The size of the covariance matrix is dynamic. The values are outputted in order across each row, i.e.: ``` 1 2 3 4 5 6 7 8 9 10 : : : : : : : : : : 51 52 53 54 55 : : : : : : : : : : ``` The ordering of values is as follows: ``` Af Ag L N Chi Psi B BDOT AGOM T C1 C2 ... Af 1 Ag 2 3 L 4 5 6 N 7 8 9 10 Chi 11 12 13 14 15 Psi 16 17 18 19 20 21 B 22 23 24 25 26 27 28 BDOT 29 30 31 32 33 34 35 36 AGOM 37 38 39 40 41 42 43 44 45 T 46 47 48 49 50 51 52 53 54 55 C1 56 57 58 59 60 61 62 63 64 65 66 C2 67 68 69 70 71 72 73 74 75 76 77 78 : : ``` where C1, C2, etc, are the "consider parameters" that may be added to the covariance matrix. The covariance matrix will be as large as the last element/model parameter needed. In other words, if the DC solved for all 6 elements plus AGOM, the covariance matrix will be 9x9 (and the rows for B and BDOT will be all zeros). If the covariance matrix is unavailable, the size will be set to 0x0, and no data will follow. The cov field should contain only the lower left triangle values from top left down to bottom right, in order. - `xposAlt1` number, double: Cartesian X position of the target, in kilometers, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `yposAlt1` number, double: Cartesian Y position of the target, in kilometers, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `zposAlt1` number, double: Cartesian Z position of the target, in kilometers, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `xvelAlt1` number, double: Cartesian X velocity of the target, in kilometers/second, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `yvelAlt1` number, double: Cartesian Y velocity of the target, in kilometers/second, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `zvelAlt1` number, double: Cartesian Z velocity of the target, in kilometers/second, in the specified alt1ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `alt1ReferenceFrame` string: The reference frame of the alternate1 (Alt1) cartesian orbital state. - `xposAlt2` number, double: Cartesian X position of the target, in kilometers, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `yposAlt2` number, double: Cartesian Y position of the target, in kilometers, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `zposAlt2` number, double: Cartesian Z position of the target, in kilometers, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `xvelAlt2` number, double: Cartesian X velocity of the target, in kilometers/second, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `yvelAlt2` number, double: Cartesian Y velocity of the target, in kilometers/second, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `zvelAlt2` number, double: Cartesian Z velocity of the target, in kilometers/second, in the specified alt2ReferenceFrame. Alternate reference frames are optional and are intended to allow a data source to provide an equivalent vector in a different cartesian frame than the primary vector. - `alt2ReferenceFrame` string: The reference frame of the alternate2 (Alt2) cartesian orbital state. - `posUnc` number, double: One sigma position uncertainty, in kilometers. - `velUnc` number, double: One sigma velocity uncertainty, in kilometers/second. - `mass` number, double: The mass of the object, in kilograms. - `area` number, double: The actual area of the object at it's largest cross-section, expressed in meters^2. - `solarRadPressCoeff` number, double: Area-to-mass ratio coefficient for solar radiation pressure. - `dragCoeff` number, double: Area-to-mass ratio coefficient for atmospheric ballistic drag (m2/kg). - `dragArea` number, double: The effective area of the object exposed to atmospheric drag, expressed in meters^2. - `revNo` integer: Epoch revolution number. - `geopotentialModel` string: Geopotential model used for this vector (e.g. EGM-96, WGS-84, WGS-72, JGM-2, or GEM-T3), including mm degree zonals, nn degree/order tesserals. E.g. EGM-96 24Z,24T. - `dragModel` string: The Drag Model used for this vector (e.g. HARRIS-PRIESTER, JAC70, JBH09, MSIS90, NONE, etc.). - `lunarSolar` boolean: Boolean indicating use of lunar/solar perturbations for this vector. - `solarRadPress` boolean: Boolean indicating use of solar radiation pressure perturbations for this vector. - `srpArea` number, double: The effective area of the object exposed to solar radiation pressure, expressed in meters^2. - `solidEarthTides` boolean: Boolean indicating use of solid earth tide perturbations for this vector. - `inTrackThrust` boolean: Boolean indicating use of in-track thrust perturbations for this vector. - `bDot` number, double: First derivative of drag/ballistic coefficient (m2/kg-s). - `edr` number, double: Model parameter value for energy dissipation rate (EDR) (w/kg). - `thrustAccel` number, double: Model parameter value for thrust acceleration (m/s2). - `cmOffset` number, double: Model parameter value for center of mass offset (m). - `lastObStart` string, date-time: The start of the time interval containing the time of the last accepted observation, in ISO 8601 UTC format with microsecond precision. For an exact observation time, the firstObTime and lastObTime are the same. - `lastObEnd` string, date-time: The end of the time interval containing the time of the last accepted observation, in ISO 8601 UTC format with microsecond precision. For an exact observation time, the firstObTime and lastObTime are the same. - `obsAvailable` integer: The number of observations available for the OD of the object. - `obsUsed` integer: The number of observations accepted for the OD of the object. - `tracksAvail` integer: The number of sensor tracks available for the OD of the object. - `tracksUsed` integer: The number of sensor tracks accepted for the OD of the object. - `recODSpan` number, double: The recommended OD time span calculated for the object, expressed in days. - `actualODSpan` number, double: The actual time span used for the OD of the object, expressed in days. - `residualsAcc` number, double: The percentage of residuals accepted in the OD of the object. - `solarFluxF10` number, double: F10 (10.7 cm) solar flux value. - `solarFluxF10Avg` number, double: F10 (10.7 cm) solar flux 81-day average value. - `solarFluxAPAvg` number, double: Average solar flux geomagnetic index. - `taiUtc` number, double: TAI (Temps Atomique International) minus UTC (Universal Time Coordinates) offset in seconds. - `ut1Utc` number, double: Universal Time-1 (UT1) minus UTC offset, in seconds. - `ut1Rate` number, double: Rate of change of UT1 (milliseconds/day) - first derivative of ut1Utc. - `polarMotionX` number, double: Polar Wander Motion X (arc seconds). - `polarMotionY` number, double: Polar Wander Motion Y (arc seconds). - `iau1980Terms` integer: Number of terms used in the IAU 1980 nutation model (4, 50, or 106). - `leapSecondTime` string, date-time: Time of the next leap second after epoch in ISO 8601 UTC time. If the next leap second is not known, the time of the previous leap second is used. - `integratorMode` string: Integrator Mode. - `partials` string: Type of partial derivatives used (ANALYTIC, FULL NUM, or FAST NUM). - `stepMode` string: Integrator step mode (AUTO, TIME, or S). - `fixedStep` boolean: Boolean indicating use of fixed step size for this vector. - `stepSizeSelection` string: Initial step size selection (AUTO or MANUAL). - `stepSize` number, double: Initial integration step size (seconds). - `errorControl` number, double: Integrator error control. - `sigmaPosUVW` number[]: Array containing the standard deviation of error in target object position, U, V and W direction respectively (km). - `sigmaVelUVW` number[]: Array containing the standard deviation of error in target object velocity, U, V and W direction respectively (km/sec). - `rms` number, double: The Weighted Root Mean Squared (RMS) of the differential correction on the target object that produced this vector. WRMS is a quality indicator of the state vector update, with a value of 1.00 being optimal. WRMS applies to Batch Least Squares (BLS) processes. - `source` string, required: Source of the data. - `origin` string: Originating system or organization which produced the data, if different from the source. The origin may be different than the source if the source was a mediating system which forwarded the data on behalf of the origin system. If null, the source may be assumed to be the origin. - `dataMode` 'REAL' | 'TEST' | 'SIMULATED' | 'EXERCISE', required: Indicator of whether the data is REAL, TEST, EXERCISE, or SIMULATED data: REAL: Data collected or produced that pertains to real-world objects, events, and analysis. TEST: Specific datasets used to evaluate compliance with specifications and requirements, and for validating technical, functional, and performance characteristics. EXERCISE: Data pertaining to a government or military exercise. The data may include both real and simulated data. SIMULATED: Synthetic data generated by a model to mimic real-world datasets. - `algorithm` string: Optional algorithm used to produce this record. - `createdAt` string, date-time: Time the row was created in the database, auto-populated by the system. - `createdBy` string: Application user who created the row in the database, auto-populated by the system. - `descriptor` string: Optional source-provided and searchable metadata or descriptor of the data. - `missionCenter` string: Mission center or organization performing this vector creation. - `transactionId` string: Optional identifier to track a commercial or marketplace transaction executed to produce this data. - `origNetwork` string: The originating source network on which this record was created, auto-populated by the system. - `sourceDL` string: The source data library from which this record was received. This could be a remote or tactical UDL or another data library. If null, the record should be assumed to have originated from the primary Enterprise UDL. - `initialOD` boolean, required: Flag indicating whether this is an initial orbit determination. - `lastObStart` string, date-time: The start of the time interval containing the time of the last accepted observation, in ISO 8601 UTC datetime format with microsecond precision. For an exact observation time, the lastObStart and lastObEnd are the same. - `lastObEnd` string, date-time: The end of the time interval containing the time of the last accepted observation, in ISO 8601 UTC datetime format with microsecond precision. For an exact observation time, the lastObStart and lastObEnd are the same. - `timeSpan` number, double: The time span used for the OD of the object, in days. - `effectiveFrom` string, date-time: Optional start time at which this OD solution is accurate, in ISO 8601 UTC datetime format with microsecond precision. - `effectiveUntil` string, date-time: Optional end time at which this OD solution may no longer be accurate, in ISO 8601 UTC datetime format with microsecond precision. - `wrms` number, double: The Weighted Root Mean Squared (RMS) of the differential correction of the target object that produced this OD state. WRMS is a quality indicator of the OD update, with a value of 1.00 being optimal. WRMS applies to batch least squares (BLS) processes. - `previousWrms` number, double: The Weighted Root Mean Squared (RMS) of the differential correction from the previous overhead pass of the satellite. Provides a point of comparison for assessing changes in the quality of the OD solution between consecutive passes. - `firstPassWrms` number, double: The Weighted Root Mean Squared (RMS) calculated for the first satellite pass in the observation span. Serves as the initial quality metric for the beginning of the observation period. - `bestPassWrms` number, double: Lowest Weighted Root Mean Squared (RMS) value achieved for any single satellite pass during the observation span, indicating the pass with the highest quality OD solution. - `errorGrowthRate` number, double: Error growth rate of the OD solution in kilometers per day. - `edr` number, double: Model parameter value for energy dissipation rate (EDR) in watts per kilogram. - `method` string, required: Orbit determination method used to produce this record (e.g. BLS, KF, UKF, etc.). - `methodSource` string: Source of orbit determination method used to produce this record (e.g. ASW, ACTRAC, FreeFlyer, GEODYNE, GDTS, etc.). - `fitSpan` number, double: The fit span, in days, used in a Batch Least Squares (BLS) OD. - `ballisticCoeffEst` boolean: Flag indicating whether the ballistic coefficient was estimated during this OD solution. - `ballisticCoeffModel` string: Model used to estimate the ballistic coefficient. - `agomEst` boolean: Flag indicating whether the AGOM was estimated during this OD solution. - `agomModel` string: Model used to estimate the AGOM. - `rmsConvergenceCriteria` number, double: OD parameter value for the Root Mean Square (RMS) convergence criteria to successfully close the OD solution. - `numIterations` integer: The number of iterations taken for the algorithm to converge on an OD solution. - `acceptedObTyps` string[]: Array of UDL observation types (e.g. DOA, EO, RADAR, RF) of the observations that were accepted in this OD solution. See the associated acceptedObIds array for the records UUID(s), positionally corresponding to the record types in this array. The acceptedObTyps and acceptedObIds arrays must match in size. - `acceptedObIds` string[]: Array of UDL data (observation) UUIDs that were accepted in this OD solution. See the associated acceptedObTyps array for the specific types of observations for the positionally corresponding UUIDs in this array (the two arrays must match in size). - `rejectedObTyps` string[]: Array of UDL observation types (e.g. DOA, EO, RADAR, RF) of the observations that were rejected in this OD solution. See the associated rejectedObIds array for the records UUID(s), positionally corresponding to the record types in this array. The rejectedObTyps and rejectedObIds arrays must match in size. - `rejectedObIds` string[]: Array of UDL data (observation) UUIDs that were rejected in this OD solution. See the associated rejectedObTyps array for the specific types of observations for the positionally corresponding UUIDs in this array (the two arrays must match in size). - `sensorIds` string[]: Array of UDL UUIDs (idSensor) of the sensors that contributed observations in this OD solution. - `createdAt` string, date-time: Time the row was created in the database, auto-populated by the system. - `createdBy` string: Application user who created the row in the database, auto-populated by the system. - `sourceDL` string: The source data library from which this record was received. This could be a remote or tactical UDL or another data library. If null, the record should be assumed to have originated from the primary Enterprise UDL. - `source` string, required: Source of the data. - `origin` string: Originating system or organization which produced the data, if different from the source. The origin may be different than the source if the source was a mediating system which forwarded the data on behalf of the origin system. If null, the source may be assumed to be the origin. - `origNetwork` string: The originating source network on which this record was created, auto-populated by the system. - `dataMode` 'REAL' | 'TEST' | 'SIMULATED' | 'EXERCISE', required: Indicator of whether the data is REAL, TEST, EXERCISE, or SIMULATED data: REAL: Data collected or produced that pertains to real-world objects, events, and analysis. TEST: Specific datasets used to evaluate compliance with specifications and requirements, and for validating technical, functional, and performance characteristics. EXERCISE: Data pertaining to a government or military exercise. The data may include both real and simulated data. SIMULATED: Synthetic data generated by a model to mimic real-world datasets. ## Other responses - `400`: Bad Request - `401`: Invalid/Missing User Credentials - `403`: User Is Not Authorized - `405`: Method Not Allowed - `406`: MediaType Not Accepted by Request Headers - `429`: Rate of Requests Exceeds Allowed Limit - `500`: Internal Server Error ## Changes > 12 revisions in range; 1 could not be searched. - **2026-04-09** `bd17bc53681e`: 1 info - added the optional property `items/aprioriStateVector/missionCenter` to the response with the `200` status - **2025-10-23** `09bd422d5ac1`: 1 warning - added the new `ECR/ECEF` enum value to the `items/aprioriStateVector/covReferenceFrame` response property for the response status `200` - **2025-09-26** `45631f9bb3f0`: 1 info - added the optional property `items/aprioriStateVector/msgTs` to the response with the `200` status - **2025-05-29** `4e1cbc17e814`: 3 warning, 2 info - added the new `EFG/TDR` enum value to the `items/aprioriStateVector/covReferenceFrame` response property for the response status `200` - added the new `GCRF` enum value to the `items/aprioriStateVector/covReferenceFrame` response property for the response status `200` - added the new `TEME` enum value to the `items/aprioriStateVector/covReferenceFrame` response property for the response status `200` - added the new optional `query` request parameter `firstResult` - …1 more - **2025-04-16** `75f764c843a9`: 1 breaking, 3 info - the `items/aprioriElset/ephemType` response's property format changed from `int32` to `int16` for status `200` - api operation id `findAll_83` removed and replaced with `` - the endpoint scheme security `BasicAuth` was removed from the API - the response optional property `items/aprioriElset` became not read-only for the status `200` [Operation history](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/changes/udl/orbitdetermination/get.md) --- [API](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api.md) - [All operations](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/llms.txt) - [OpenAPI document](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/revisions/bd17bc53681e?raw)