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GPM Orbit Boost

(Added on December 1, 2023)
As in the announcement of the NASA homepage, the GPM Core Observatory satellite performed two orbit boost maneuvers on Nov. 7 and 8, 2023 that raised its altitude from 400km to 435km.

The NASA homepage also says everything is nominal.

By this orbit boost, we expect the lifespan of the GPM Core Observatory became closer to the original estimates of ending in the early 2030’s.
We already resumed providing the GMI and the GSMaP data. On the other hand, we plan to resume providing DPR products after updating the algorithms.

The schedule of the DPR data is as follows (as of November 2023).

  • Start to provide DPR near real-time data in early January 2024
  • Start to provide DPR standard products (calibrated and evaluated) in March 2024

We apologize for any inconvenience this may cause and ask for your understanding and cooperation.


(Added on November 1, 2023)
We suspend to provide GPM/DPR products(V07) from 8:00(UT) November 7, 2023 because of GPM orbit boost. We are going to restart providing Near-real-time products from January 2024, Standard products from March 2024.
The detail information from here



As in the announcement of the NASA GPM Website, the GPM Core Observatory satellite is scheduled to undergo a series of orbit boost maneuvers which will raise its altitude from 400km to 435km. Tentatively scheduled for Nov. 8 and 10, 2023, the goal of these boosts is to restore the GPM Core Observatory’s lifespan closer to the original estimates of ending in the early 2030’s. Recent lifespan estimates have been getting shorter due to unexpectedly high solar activity, which causes additional atmospheric drag on the spacecraft. The primary goal of restoring GPM’s lifespan is to allow the GPM mission to overlap with the satellites associated with the future Atmosphere Observing System (AOS) mission planned by NASA, JAXA, and other agencies, allowing for intercalibration of instruments between the GPM and AOS missions.

By the orbit boost of the GPM Core Observatory, following Impacts on the Dual-frequency Precipitation Radar (DPR) are expected.

  • Instrument footprints and swath widths will increase proportionately with the altitude change.
  • Radar sensitivity will be reduced slightly.

Tables 1 and 2 summarize the impacts of the DPR instrument.

Table 1: Change of the spatial resolution and the swath width in the DPR instrument by the orbit boost

Satellite altitude Spatial resolution Swath width
Nadir (Angle-bin No. 25) Scan edge (Angle-bin No. 1, 49)
407km 5.04km×5.04km 5.04km×5.57km 255.8km
443km 5.48km×5.48km 5.48km×6.05km 277.9km

Table 2: Change of the sensitivity in the DPR instrument by the orbit boost (by Dr. K. Kanemaru, NICT)

Satellite altitude Spatial resolution S/N change (total)
407 km -5.0 km  
430 km -5.3 km - 0.64 dB
450 km -5.6 km - 1.11 dB

Please see also the NASA GPM website for the GPM orbit boost.