![]() There are 21 GUARDIAN GDGPS data collections available through Earthdata Search and direct CDDIS data download.ĬDDIS GNSS data access and more information Global Hydrometeorology Resource Center Distributed Active Archive Center (GHRC DAAC) WISPER IMPACTS Dataset Updated The GUARDIAN system uses more than 70 GNSS ground stations distributed around the Pacific Ring of Fire, monitoring four GNSS constellations (GPS, Galileo, BDS, and GLONASS). ![]() GUARDIAN GDGPS is a near real-time (NRT) ionospheric monitoring software for natural hazards warning, aiming to supplement the existing natural hazards early warning systems, and is currently the only software capable of providing multi-GNSS NRT Total Electron Content time series over the Pacific region to the general public and scientific community. NASA’s CDDIS released data for the Global Navigation Satellite System ( GNSS)-based Upper Atmospheric Real-time Disaster Information and Alert Network ( GUARDIAN) Global Differential GPS (GDGPS) System. More information on MOPITT hot calibration Crustal Dynamics Data Information System (CDDIS) CDDIS Releases GUARDIAN GDGPS Data The instrument is expected to be back online by December 8, 2023. During this period, the instrument will be taken out of science mode so that the near infrared channel can be calibrated and other activities can be performed. The Measurement of Pollution in the Troposphere ( MOPITT) instrument team is planning its quasi-annual hot calibration from November 27 to December 8, 2023. More information on MISR L1 and L2 MOPITT Calibration Announced This will be revisited when data from the entire mission are reprocessed to incorporate future product refinements. ![]() Products generated prior to orbit 121388 remain unchanged and retain their version numbers. Credit: NASA's JPL.ĭue to the change in the Terra satellite’s orbit altitude in October 2022, Level 1 and Level 2 data products from the Multi-angle Imaging SpectroRadiometer ( MISR) instrument required a significant update and will now be distributed in netCDF-4 format.Ĭurrent orbits beginning with orbit 126974 are now available, and past orbits will become available as fill-in processing proceeds. The locations imaged by MISR's nine cameras (each with four color bands) along Earth's surface are illustrated here with translucent surfaces. Direction of flight is toward the lower left. This computer-generated image shows the Terra spacecraft, which carries the MISR instrument, orbiting Earth.
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