Global L-band Observatory for water cycle studies (GLOWS): soil moisture continuity mission (Conference Presentation)

SMOS and SMAP radiometers have demonstrated the ability to monitor soil moisture and sea surface salinity and continue to provide high quality radiometric measurements to this day in extended mission operations. Unfortunately, the SMAP quad-polarization radar failed soon after launch. However, the SMAP polarimetric radiometer continues to provide high quality polarimetric radiometer measurements to the present. After 9 years of operation SMAP is now well beyond its design life. It is important to maintain data continuity for these science measurements. The proposed GLOWS instrument concept will enable low-cost L-band data continuity (that includes both L-band radar and radiometer measurements). The objective of this project is to develop key instrument technology to enable L-band observations using an Earth Venture class satellite. Specifically, a new deployable reflectarray lens antenna is being developed that will enable a smaller EELV Secondary Payload Adapter (ESPA) Grande-class satellite mission to continue the L-band observations at SMAP and SMOS resolution and accuracy at substantially lower cost, size, and weight.