10:45 AM - 11:00 AM
[ACG46-25] Studies on future spaceborne precipitation measuring mission
Keywords:precipitation observation mission, radar
Based on achievements of TRMM and GPM, science targets of the future precipitation mission have been discussed among the GPM science community.
One of the science targets is cloud-precipitation processes. Since the cloud and precipitation interaction is important process of the precipitation formation. Both the cloud and precipitation observation is also very helpful to evaluate the cloud physical processes of the numerical climate models. The societal contribution target will be to improve GSMaP both on the accuracy and data latency.
For these purposes, three types of missions are considered: 1)small radar constellation satellites to upgrade the GSMaP product by replace the passive microwave estimation by radar estimation (radar constellation), 2) development of the DPR type radar with better sensitivity and the wider swath observation based on the advances on the solid state power amplifier and the wide swath operation of the TRMM EOM experiment (DPR2), and 3) radar observation of precipitation from geostationary satellite (GPR).
Feasibility studies for these missions have started on the key elements such as precipitation estimation accuracy for radar constellation satellite, feasibility study on the pulse compression technology for wide swath operation of DPR2, and feasibility of the large antenna design and the clutter mitigation for GPR.
Time scale of these missions are different; DPR2 is almost ready to move the development phase, the development of small radar for the radar constellation needs the feasibility of small antenna system through bread board model (BBM) development, and several fundamental technologies such as deployable large size antenna are needed to demonstrate in orbit for GPR.