41,581 to 41,590 of 42,332 Results
Jun 20, 1993
Pap, Judit M.; Willson, Richard C.; Frohlich, Claus; Donnelly, Richard F.; Puga, Larry, 1993, "Long-Term Variations in Total Solar Irradiance", https://hdl.handle.net/2014/36482, Boulder, CO, JPL Open Repository
For more than a decade total solar irradiance has been monitored simultaneously from space by different satellites. The detection of total solar irradiance variations by satellite -based experiments during the past decade and a half has stimulated modeling efforts to help identif... |
Jun 20, 1993
Pap, Judit M.; Wehrli, Christoph, 1993, "SOLERS22 Working Group 1 Report", https://hdl.handle.net/2014/36577, Boulder, CO, JPL Open Repository
SOLERS22 Working Group 1 had extensive discussions of current and future space and ground-based observations of total solar irradiance as well as near-UV, visible, and infrared irradiances during the 1-day SOLERS22 meeting held at the IAU Colloquium No. 143 on June 25, 1993. The... |
Jun 20, 1993
Vorperian, Vatche; McLyman, Colonel, 1993, "Analysis of a PWM-Resonant DC-TO-DC Converter", https://hdl.handle.net/2014/34991, Seatle, Washington, USA, JPL Open Repository
When a parallel resonant tank is excited by a bipolar current pulse train a sinusoidal voltage develops across the tank whose amplitude depends on the duty cycle of the pulse train. |
Jun 20, 1993
Pap, Judit, 1993, "Preface (for CUP)", https://hdl.handle.net/2014/33678, Boulder, Colorado, USA, JPL Open Repository
Study of changes in solar and stellar irradiances has been of high interest for a long time. Determining the absolute value of the luminosity of stars with different ages is a crucial question for the theory of stellar evolution and energy production in stellar interiors. |
Jun 17, 1993
Golshan, N., 1993, "Direct Broadcast Satellite-Radio, Space-Segment/Receiver Tradeoffs", https://hdl.handle.net/2014/35074, Pasadena, California, USA, JPL Open Repository
This paper looks at the balance between receiver complexity and the required satellite EIRP for Direct Broadcast Satellite-Radio (DBS-R). |
Jun 16, 1993
Wu, T.K.; Farazian, K.; Golshan, N.; Divsalar, D.; Hinedi, S., 1993, "L-Band Mobile Terminal Antennas for Helicopters", https://hdl.handle.net/2014/35067, Pasadena, CA, JPL Open Repository
The feasibility of using a low gain antenna (LGA) as a mobile terminal antenna for helicopters is described in this paper. The objectives are 1) to select the lowest cost antenna system which can be easily mounted on a helicopter and capable of communicating with a satellite, and... |
Jun 16, 1993
Abbe, B.; Frye, R.; Jedrey, T., 1993, "ACTS Mobile SATCOM Experiments", https://hdl.handle.net/2014/35068, Pasadena, California, USA, JPL Open Repository
This paper describes the ACTS Mobile Experiments Program, and the development of several mobile SATCOM technologies. |
Jun 16, 1993
Divsalar, Dariush; Simon, Marvin K., 1993, "Pseudo-Coherent Demodulation for Mobile Satellite Systems", https://hdl.handle.net/2014/35304, Pasadena, California, USA, JPL Open Repository
This paper proposes three so-called pseudo-coherent demodulation schemes for use in land mobile satellite channels. The schemes are derived based on maximum-likelihood (ML) estimation and detection of an N-symbol observation of the received signal. |
Jun 16, 1993
Abbe, B.; Jedrey, T.; Estabrook, P.; Agan, M., 1993, "ACTS Broadband Aeronautical Experiment", https://hdl.handle.net/2014/35073, Pasadena, California, USA, JPL Open Repository
This paper describes how K/Ka-band mobile satellite technology could be useful in meeting increased demands for aeronautical mobile satellite communication services. |
Jun 16, 1993
Tulintseff, A.; Crist, R.; Densmore, A.; Sukamto, L., 1993, "An Active K/K-Band Antenna Array for the NASA ACTS Mobile Terminal", https://hdl.handle.net/2014/35066, Pasadena, California, USA, JPL Open Repository
An active K/K-band antenna array is currently under develoment for NASA's ACTS Mobile Terminal (AMT). The AMT task will demonstrate voice, data, and video communications to and from the AMT vehicle in Los Angeles, California, and a base station in Cleveland, Ohio, via the ACTS sa... |