Accès ouvert
2008
conference-paper
OpenAlex
Michael A. Krainak, Jeffrey R. Chen, Philip W. Dabney, Jeffrey F. Ferrara et autres
NASA Goddard Space Flight Center is developing a direct-detection free-space laser communications transceiver test bed. The laser transmitter is a master-oscillator power amplifier (MOPA) configuration using a 1060 nm wavelength laser-diode with a two-stage multi-watt Ytterbium fiber amplifier. Dual Mach-Zehnder electro-optic modulators …
us
(code pays fourni par la source)
2004
conference-paper
OpenAlex
Christopher S. Ruf, C. Principe
The X-Band Lightweight Rainfall Radiometer (LRR-X) is an aircraft microwave sensor that is under development for the NASA Earth Science Technology Office by Goddard Space Flight Center and the University of Michigan. LRR-X is intended to address several pressing issues related to …
us
(code pays fourni par la source)
2003
conference-paper
OpenAlex
Christopher S. Ruf, C. Principe, T. Dod, B. Gosselin et autres
The X-Band Lightweight Rainfall Radiometer using synthetic thinned aperture radiometer technology (LRR-X STAR) is an aircraft microwave sensor that is jointly under development by the NASA Goddard Space Flight Center and the University of Michigan. It operates at 10.7 GHz with 86+ …
us
(code pays fourni par la source)
2002
conference-paper
OpenAlex
Edward Kim, J. C. Shiue, Terence Doiron, C. Principe et autres
Although the L-band (1.4 GHz) is generally considered ideal for passive microwave sensing of soil moisture, near-future satellite instruments such as the Advanced Microwave Scanning Radiometer (AMSR) will provide C-band (/spl sim/7 GHz) observations, not L-band observations. Prior to 1999, adequate field …
us
(code pays fourni par la source)
2002
conference-paper
OpenAlex
Christopher S. Ruf, C. Principe, Steven P. Neeck
The Tropical Rainfall Measuring Mission (TRMM) is a joint NASA/NASDA mission intended to produce rainfall accumulation maps using a combined active radar and passive radiometer set of sensors. The TRMM orbit inclination of 35 deg limits coverage to the tropics. The single …
us
(code pays fourni par la source)
2002
conference-paper
OpenAlex
Eric A. Smith, Wendy J. Adams, Christian D. Kummerow, C. Principe et autres
The Earth Science Division of NASA (Code Y) supports the development of advanced technology, including new aircraft and satellite instrumentation, under the Instrument Incubator Program (IIP). The IIP is administrated through the Earth Science Technology Office (ESTO) whose mandate includes helping guide …
us
(code pays fourni par la source)
2002
article
OpenAlex
Eric A. Smith, E. Im, Christian D. Kummerow, C. Principe et autres
An interferometer-type passive microwave radiometer based on MMIC receiver technology and a thinned array antenna design is being developed under the Instrument Incubator Program (TIP) on a project entitled the Lightweight Rainfall Radiometer (LRR). The prototype single channel aircraft instrument will be …
us
(code pays fourni par la source)
2002
article
OpenAlex
C. Principe, Christopher S. Ruf, Carolyn A. Krebs
A proposed methodology for the in-flight calibration of a Synthetic Thinned Aperture Radiometer (STAR) airborne sensor with the potential application to a space flight version. The application of the spaceflight version of this instrument will address several pressing issues related to the …
us
(code pays fourni par la source)
1990
article
OpenAlex
C. Principe
1987
conference-paper
OpenAlex
Cynthia M. Collins, Javier Lecha, C. Principe, Douglas D. Ross
International Telemetering Conference Proceedings / October 26-29, 1987 / Town and Country Hotel, San Diego, California