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  • CDDIS_SLR_predictions

    https://cmr.earthdata.nasa.gov/search/concepts/C1000000025-CDDIS.xml
    Description:

    Predicted satellite orbits for Satellite Laser Ranging (SLR) tracking of satellites equipped with corner cube retroreflectors. SLR stations download these prediction files and coordinate tracking schedules for satellite acquisition. The predicted orbit files typically contain orbit information for multiple days and are issued on a daily or sub-daily basis.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    CDDIS Short Name: CDDIS_SLR_predictions Version ID: 1 Unique ID: C1000000025-CDDIS

  • GEOS-3 ALTIMETER GEOPHYSICAL DATA RECORD 1975-1978

    https://cmr.earthdata.nasa.gov/search/concepts/C2491735231-POCLOUD.xml
    Description:

    These data consist of Geos-3 altimeter measurements produced by NOAA/NODC/Laboratory for Satellite Altimetry. The dataset contains 5,006,956 altimetric sea surface heights and supporting information such as sea state, wind speed, Schwiderski ocean tide height, and Cartwright solid-tide height. Corrections for altimeter bias, wet and dry troposheric delays, and electromagnetic bias are not included. The corrections in this dataset (tides and even orbit height) are old and not very accurate. This dataset should only be used by those with an expertise in altimetry. Measurements are compressed to a rate of 1 per second using a trim mean filter. Data values are written in binary format.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    POCLOUD Short Name: GEOS-3_ALT_GDR Version ID: 1 Unique ID: C2491735231-POCLOUD

  • GEOS-3 Satellite-to-Satellite Tracking Data V001 (GEOS3STST) at GES DISC

    https://cmr.earthdata.nasa.gov/search/concepts/C2829925415-GES_DISC.xml
    Description:

    GEOS3STST is the satellite-to-satellite tracking data product which contains observations, obtained from the S-band transponders on GEOS 3 relayed by the ATS 6 spacecraft to various ground stations, used for geodetic studies. Data are available for the time period from 1975-04-13 to 1976-04-28 in sixteen files, written in ASCII text, where each measurement is recorded as two lines of text.\n\nThe principal investigator for the Satellite-to-Satellite Tracking experiment was Indalecio Y. Galicinao from NASA/GSFC.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    GES_DISC Short Name: GEOS3STST Version ID: 001 Unique ID: C2829925415-GES_DISC

  • Long wavelength Earth gravity field series from satellite tracking, altimeter and surface data, spherical harmonic representation

    https://cmr.earthdata.nasa.gov/search/concepts/C1214585774-SCIOPS.xml
    Description:

    GRIM4-C global gravity field models are based on the analysis of satellite orbit perturbations, evaluating optical, doppler and laser tracking data of about 30 satellites, combined with 1degx1deg gravity anomaly data sets completed by geoid undulations over the oceans derived from satellites altimetry or by directly evaluating altimeter data. The models are given as a set of fully normalized spherical harmonic coefficients complete to degree and order 50 and 60 (GRIM4-C3, GRIM4-C3T), respectively. The first solution GRIM4-C1 includes data from 27 satellites, 1degx1deg gravity anomalies (OSU 89) and 1degx1deg SEASAT geoid undulations (March 89); GRIM4-C2 (29 satellites), GRIM4-C3 (30 satellites, OSU 91 gravity anomalies, GEOS3/SEASAT/GEOSAT geoid undulations) , and GRIM4-C4 (32 satellites, OSU 91 plus selected gravity anomalies, ERS geoid undulations) are improved solutions. GRIM4-C3T is taken form a joint gravity, sea surface topography solution with 18d-GEOSAT file.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    SCIOPS Short Name: GFZ-GRIM4-C Version ID: Not provided Unique ID: C1214585774-SCIOPS

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