--- title: "GET /udl/gnssobservationset/tuple" method: GET path: "/udl/gnssobservationset/tuple" tags: ["Observation"] --- # GET /udl/gnssobservationset/tuple `GET /udl/gnssobservationset/tuple` ## Request - Base URL: `https://unifieddatalibrary.com` - URL: `https://unifieddatalibrary.com/udl/gnssobservationset/tuple` - Auth: none declared Service operation to dynamically query data and only return specified columns/fields. Requested columns are specified by the 'columns' query parameter and should be a comma separated list of valid fields for the specified data type. classificationMarking is always returned. See the queryhelp operation (`/udl//queryhelp`) for more details on valid/required query parameter information. An example URI: /udl/elset/tuple?columns=satNo,period&epoch=>now-5 hours would return the satNo and period of elsets with an epoch greater than 5 hours ago. ## Query parameters - `columns` string, required - `ts` string, date-time, required - `firstResult` integer - `maxResults` integer ## Response `200` OK - GNSSObservationSetFull[] - `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. - `markerType` string: The marker type of the observing receiver (AIRBORNE, ANIMAL, BALLISTIC, FIXED BUOY, FLOATING BUOY, FLOATING ICE, GEODETIC, GLACIER, GROUNDCRAFT, HUMAN, NON GEODETIC, NON PHYSICAL, SPACEBORNE, WATERCRAFT). Reference RINEX 3+ for further information concerning marker types. - `idOnOrbit` string: Unique identifier of the primary satellite on-orbit object. - `satNo` integer: Satellite/catalog number of the target on-orbit object. - `origObjectId` string: Optional identifier provided by ephemeris source to indicate the target object of this ephemeris. This may be an internal identifier and not necessarily map to a valid satellite number. - `ts` string, date-time, required: Observation Time, in ISO8601 UTC format with microsecond precision. This timestamp applies to all observations within the set. - `outage` integer: Time, in seconds, that the receiver has been unable to compute a GNSS fix. - `gDop` number, double: Geometric Dilution of Precision. - `hDop` number, double: Horizontal Dilution of Precision. - `pDop` number, double: Position Dilution of Precision. - `tDop` number, double: Time Dilution of Precision. - `vDop` number, double: Vertical Dilution of Precision. - `eventId` string: Optional source-provided identifier for this collection event. This field can be used to associate records related to the same event. - `esId` string: Unique identifier of the parent Ephemeris Set, if this data is correlated with an Ephemeris. If reporting for a spacecraft with multiple onboard GNSS receivers, this ID may be associated with multiple GNSS Observation records if each receiver is synced to the ephemeris points. - `receiver` string: The number or ID of the GNSS receiver associated with this data. Each GNSS Observation Set is associated with only one receiver. If reporting for multiple receivers a separate set should be generated for each. A null value is assumed to indicate that only one receiver is present, or reported. - `boresight` number[]: unit vector of the outward facing direction of the receiver boresight in a body-fixed coordinate system. - `quat` number[]: The quaternion describing the rotation of the body-fixed frame used for this system into the local geodetic frame, at observation time (ts). The array element order convention is scalar component first, followed by the three vector components. For a vector u in the body-fixed frame, the corresponding vector u' in the geodetic frame should satisfy u' = quq*, where q is this quaternion. - `lat` number, double: WGS-84 spacecraft latitude sub-point at observation time (ts), represented as -90 to 90 degrees (negative values south of equator). - `lon` number, double: WGS-84 spacecraft longitude sub-point at observation time (ts), represented as -180 to 180 degrees (negative values west of Prime Meridian). - `alt` number, double: Spacecraft altitude at observation time (ts), expressed in kilometers above WGS-84 ellipsoid. - `satPosition` number[]: Three element array, expressing the ECI J2K spacecraft position components, in kilometers, at observation time (ts). The array element order is [x, y, z]. - `satVelocity` number[]: Three element array, expressing the ECI J2K spacecraft velocity components, in km/second, at observation time (ts). The array element order is [xvel, yvel, zvel]. - `obsCodes` string[]: Array of the strings containing the individual observation code sets that are contained within this GNSS Observation set. Each string is a three-character representation of the measurement type, the channel, and the coding, in compliance with the RINEX 3+ standard (Pseudorange (C), Carrier Phase (L), Doppler (D), Signal Strength C/No (S), or Channel Number (X)). See the GNSS Observation ob field for the units of measure associated with each observation type. - `trackingStatus` integer: Status of the GNSS receiver signal. Status options are 0, 1 or 2 (0 being the best). - `navigationStatus` string: The current navigation status as defined by the data source. In general the navigation status specifies whether the signal is normal, degraded, or unavailable. For status value definitions please reach out to data source provider. - `agcState` integer: GNSS Automatic Gain Control State. - `srcTyps` string[]: Array of UDL record types (AIS, CONJUNCTION, DOA, ELSET, EO, ESID, GROUNDIMAGE, POI, MANEUVER, MTI, NOTIFICATION, RADAR, RF, SIGACT, SKYIMAGE, SV, TRACK) that are related to this GNSS Observation Set. See the associated 'srcIds' array for the record UUIDs, positionally corresponding to the record types in this array. The 'srcTyps' and 'srcIds' arrays must match in size. - `srcIds` string[]: Array of UUIDs of the UDL data records that are related to this GNSS Observation Set. See the associated 'srcTyps' array for the specific types of data, positionally corresponding to the UUIDs in this array. The 'srcTyps' and 'srcIds' arrays must match in size. See the corresponding srcTyps array element for the data type of the UUID and use the appropriate API operation to retrieve that object (e.g. /udl/statevector/{uuid}). - `tags` string[]: Optional array of provider/source specific tags for this data, where each element is no longer than 32 characters, used for implementing data owner conditional access controls to restrict access to the data. Should be left null by data providers unless conditional access controls are coordinated with the UDL team. - `transactionId` string: Optional identifier to track a commercial or marketplace transaction executed to produce this 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. - `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. - `origNetwork` string: The originating source network on which this record was created, auto-populated by the system. - `gnssObservationList` GNSSObservationFull[]: GNSSObservations associated with this GNSSObservationSet. - `gnssSatId` string: RINEX 3+ compliant GNSS System and Satellite Identifier (represented as SNN, where S is the system code, and NN is the satellite identifier) associated with this observation: G - GPS (NN = PRN) R - GLONASS (NN = Slot Number) S - SBAS Payload (NN = PRN-100) E - Galileo (NN = PRN) C - BeiDou (NN = PRN) J - QZSS (NN = PRN - 1923) I - IRNSS (NN = PRN) - `trackingStatus` integer: Status of the GNSS receiver signal. Status options are 0, 1 or 2 (0 being the best). - `agcState` integer: GNSS Automatic Gain Control State. - `obsCodeSet` string[]: The observation code set that applies to this observation record. Reference RINEX 3+ for further information concerning observation code set conventions. - `ob` number[]: Array of observation(s). The ob array must be the same length as the obsCodeSet. Pseudorange (C) is expressed meters, carrier phase (L) in cycles, doppler (D) in Hz where + values indicate approaching sats, and signal strength C/No (S) in dB-Hz. ## 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. - **2026-03-25** `173e4aff893f`: 4 breaking - the `items/boresight` response property's minItems was decreased from `2` to `0` for the response status `200` - the `items/quat` response property's minItems was decreased from `4` to `0` for the response status `200` - the `items/satPosition` response property's minItems was decreased from `3` to `0` for the response status `200` - the `items/satVelocity` response property's minItems was decreased from `3` to `0` for the response status `200` - **2025-05-29** `4e1cbc17e814`: 2 info - added the new optional `query` request parameter `firstResult` - added the new optional `query` request parameter `maxResults` - **2025-04-16** `75f764c843a9`: 2 info - api operation id `findAllTuples_51` removed and replaced with `` - the endpoint scheme security `BasicAuth` was removed from the API [Operation history](https://skmtc.dev/bluestaq/apis/unified-data-library-services-api/changes/udl/gnssobservationset/tuple/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)