Publication Date:
2019-07-13
Description:
The Soil Moisture Active/Passive (SMAP) mission is a NASA mission identified by the NRC 'decadal survey' to measure both soil moisture and freeze/thaw state from space. The mission will use both active radar and passive radiometer instruments at L-Band. In order to achieve a wide swath at sufficiently high resolution for both active and passive channels, an instrument architecture that uses a large rotating reflector is employed. The instrument system has completed the preliminary design review (PDR) stage, and detailed instrument design has begun. In addition to providing an overview of the instrument design, two recent design modifications are discussed: 1) The addition of active thermal control to the instrument spun side to provide a more stable, settable thermal environment for the radiometer electronics, and 2) A 'sequential transmit' strategy for the two radar polarization channels which allows a single high-power amplifier to be used.
Keywords:
Communications and Radar; Earth Resources and Remote Sensing; Instrumentation and Photography
Type:
2011 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2011); Jul 24, 2011 - Jul 29, 2011; Vancouver, BC; Canada
Format:
text
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