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Assessment of Radiometer Calibration With GPS Radio Occultation for the MiRaTA CubeSat Mission
Name
JSTARS_MiRaTA_GPSRO_Calibration_20160702_formatted.pdf
Description
Accepted version
Size
1.26 MB
Format
Adobe PDF
Checksum (MD5)
fa7fa0ecaeb8197cab820a463eaf94b4
Author(s)
Marinan, Anne D
Cahoy, Kerri L
Bishop, Rebecca L
Lui, Susan Seto
Bardeen, James R
Mulligan, Tamitha
Blackwell, William J
Leslie, Robert Vincent
Osaretin, Idahosa A
Shields, Michael
Date Issued
2016
Journal
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Marinan, Anne D., et al. "Assessment of Radiometer Calibration with Gps Radio Occultation for the Mirata Cubesat Mission." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 9 12 (2016): 5703-14.
Version
Author's final manuscript
Abstract
© 2016 IEEE. The microwave radiometer technology acceleration (MiRaTA) is a 3U CubeSat mission sponsored by the NASA Earth Science Technology Office. The science payload on MiRaTA consists of a triband microwave radiometer and global positioning system (GPS) radio occultation (GPSRO) sensor. The microwave radiometer takes measurements of all-weather temperature (V-band, 50-57 GHz), water vapor (G-band, 175-191 GHz), and cloud ice (G-band, 205 GHz) to provide observations used to improve weather forecasting. The Aerospace Corporation's GPSRO experiment, called the compact total electron content and atmospheric GPS sensor (CTAGS), measures profiles of temperature and pressure in the upper troposphere/lower stratosphere (∼20 km) and electron density in the ionosphere (over 100 km). The MiRaTA mission will validate new technologies in both passive microwave radiometry and GPSRO: 1) new ultracompact and low-power technology for multichannel and multiband passive microwave radiometers, 2) the application of a commercial off-the-shelf GPS receiver and custom patch antenna array technology to obtain neutral atmospheric GPSRO retrieval from a nanosatellite, and 3) a new approach to space-borne microwave radiometer calibration using adjacent GPSRO measurements. In this paper, we focus on objective 3, developing operational models to meet a mission goal of 100 concurrent radiometer and GPSRO measurements, and estimating the temperature measurement precision for the CTAGS instrument based on thermal noise Based on an analysis of thermal noise of the CTAGS instrument, the expected temperature retrieval precision is between 0.17 and 1.4 K, which supports the improvement of radiometric calibration to 0.25 K.
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
10.1109/JSTARS.2016.2598798
