---
title: "GET /udl/taiutc/history"
method: GET
path: "/udl/taiutc/history"
tags: ["Earth Orientation Parameters"]
---

# GET /udl/taiutc/history

`GET /udl/taiutc/history`

## Request

- Base URL: `https://unifieddatalibrary.com`
- URL: `https://unifieddatalibrary.com/udl/taiutc/history`
- Auth: none declared

Service operation to dynamically query historical data by a variety of query parameters not specified in this API documentation. See the queryhelp operation (`/udl/<datatype>/queryhelp`) for more details on valid/required query parameter information.

## Query parameters

- `columns` string
- `adjustmentDate` string, date-time, required
- `firstResult` integer
- `maxResults` integer

## Response `200`

OK

- TAIUTCFull[]
  - `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.
  - `adjustmentDate` string, date-time, required: Effective date/time for the leap second adjustment.
  - `taiUTC` number, double: Total/cumulative offset between TAI and UTC time as of adjustmentDate, in seconds.
  - `multiplicationFactor` number, double: Multiplication factor of the leap second adjustment.
  - `rawFileURI` string: Optional URI location in the document repository of the raw file parsed by the system to produce this record. To download the raw file, prepend https://udl-hostname/scs/download?id= to this value.
  - `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.
  - `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.
  - `updatedAt` string, date-time: Time the row was last updated in the database, auto-populated by the system.
  - `updatedBy` string: Application user who updated the row in the database, auto-populated by the system.

## 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.

- **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 `findAllHistory_63` 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/taiutc/history/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)