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TCTE Level 3 Total Solar Irradiance Daily Means V004 (TCTE3TSID) at GES DISC

Metadata Updated: December 7, 2023

TCTE3TSID Version 004 is the final version of this data product, and supersedes all previous versions.

The Total Solar Irradiance (TSI) Calibration Transfer Experiment (TCTE) data set TCTE3TSID contains daily averaged total solar irradiance (a.k.a solar constant) data collected by the Total Irradiance Monitor (TIM) instrument covering the full wavelength spectrum. The data are normalized to one astronomical unit (1 AU).

The TCTE/TIM instrument measures the Total Solar Irradiance (TSI), monitoring changes in incident sunlight to the Earth's atmosphere using an ambient temperature active cavity radiometer to a designed absolute accuracy of 350 parts per million (ppm, 1 ppm=0.0001% at 1-sigma), and a precision and long-term relative accuracy of 10 ppm per year. Due to the small size of these data and to maximize ease of use to end-users, each delivered TSI product contains science results for the entire mission in an ASCII column formatted file.

Early in the mission, between Dec 2013 and May 2014, TCTE acquired daily measurements to establish good overlap with the SORCE TIM. From May 2014 to Dec 2014, the TCTE measurements were reduced to weekly, which greatly subsample the true solar variability, and thus have little value for solar research. Beginning in Jan 2015, daily obervations were resumed. The mission ended June 30, 2019.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Identifier C1704861169-GES_DISC
Data First Published 2020-03-06
Language en-US
Data Last Modified 2020-03-06
Category TCTE, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Kopp, G.. 2020-03-10. TCTE3TSID. Version 004. TCTE Level 3 Total Solar Irradiance Daily Means V004. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). Digital Science Data.
Creator Kopp, G.
Data Presentation Form Digital Science Data
Graphic Preview File
Harvest Object Id b3714a31-0cbd-4b28-ae5c-b28dba26f7df
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Program Code 026:001
Release Place Greenbelt, MD, USA
Series Name TCTE3TSID
Source Datajson Identifier True
Source Hash 9939a52c4950f4ee806aa4c67bb3a54de22f1392264922a804b3c675a221ed9b
Source Schema Version 1.1
Temporal 2013-12-13T00:00:00Z/2019-05-15T23:59:59.999Z

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