The Earth, Clouds, Aerosols and Radiation Explorer (EarthCARE) mission is joint mission between Europe and Japan
for the launch year of 2015. Mission objective is to improve scientific understanding of cloud-aerosol-radiation
interactions that is one of the biggest uncertain factors for numerical climate and weather predictions. The EarthCARE
spacecraft equips four instruments such as an ultra violet lidar (ATLID), a cloud profiling radar (CPR), a broadband
radiometer (BBR), and a multi-spectral imager (MSI) to observe aerosols, clouds and their interactions simultaneously
from the orbit. Japan aerospace exploration agency (JAXA) is responsible for development of the CPR that will be the
first space-borne W-band Doppler radar. The CPR is defined with minimum radar sensitivity of -35dBz, radiometric
accuracy of 2.7 dB, and Doppler velocity measurement accuracy of 1m/s. These specifications require highly accurate
pointing technique in orbit and high power source with large antenna dish. JAXA and National Institute of Information and Communications Technology (NICT) have been jointly developed this CPR to meet these requirements. In addition, new ground calibration technique is also being progressed for the launch of EarthCARE/CPR. This evaluation method will also be the first use for spacecraft as well as Doppler cloud radar. This paper shows the summary of the CPR design and verification status, and activity status of development of ground calibration method with a few results of experiment using current space-borne cloud radar (CloudSat, NASA).
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. Okada ; T. Kimura ; H. Nakatsuka ; Y. Seki ; G. Kadosaki, et al.
EarthCARE/CPR design and verification status
", Proc. SPIE 8533, Sensors, Systems, and Next-Generation Satellites XVI, 85330D (November 19, 2012); doi:10.1117/12.974479; http://dx.doi.org/10.1117/12.974479