edu.ucar.opensky::articles:26349 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:31:11.605902 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7rx9h2s https://doi.org/10.5065/t353-c093 https Related Dataset #1 COSMIC-2 Data Products Processing and validation of FORMOSAT-7/COSMIC-2 GLONASS Total Electron Content observations 2023-06-01T00:00:00Z publication https://n2t.org/ark:/85065/d7rx9h2s https://doi.org/10.1029/2022RS007589 Pedatella, Nicholas M. author Zakharenkova, Irina author Braun, John J. author Cherniak, Iurii author Hunt, Douglas C. author Schreiner, William S. author Straus, P. author Valant-Weiss, B. author Van Hove, Teresa author Weiss, Jan-Peter author Wu, Qian author UCAR/NCAR - Library publisher The Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (FORMOSAT-7/COSMIC-2, F7/C2) Tri-GNSS Radio Occultation System observes both Global Positioning System (GPS) and GLObalnaya NAvigazionnaya Sputnikovaya Sistema (GLONASS) slant total electron content (TEC). Space-based TEC observations have historically relied on GPS signals, and the processing methodologies and data quality of GLONASS absolute TEC observations are thus less well established. We present a description of the differences in the processing for the F7/C2 GLONASS absolute TEC observations. This primarily entails estimation of a paired receiver-transmitter differential code bias, which is needed due to the GLONASS usage of frequency-division multiple access. We additionally perform a validation of the F7/C2 GLONASS absolute TEC observations through comparison with colocated F7/C2 GPS absolute TEC observations. Based on this comparison, we estimate the GLONASS absolute TEC error to be similar to 2.6 TEC units (TECU), which is similar to previous estimates of the F7/C2 GPS absolute TEC error (similar to 2.5 TECU). This demonstrates that the F7/C2 GLONASS absolute TEC observations are generally similar in quality to the F7/C2 GPS absolute TEC observations, and are suitable for use by the operational and scientific communities. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2023 American Geophysical Union (AGU). None eng geoscientificInformation