Abstract. The Brewer ozone spectrophotometer (the Brewer) was designed at Environment and Climate Change Canada (ECCC) in the 1970s to make accurate automated total column measurements. Since 1980s, instrument has become a World Meteorological Organization (WMO) Global Atmosphere Watch (GAW) standard monitoring instrument. Now, more than 230 Brewers have been produced. To assure quality of meas...

A satellite communications system is based on antennas in a stable orbit above the earth. Satellites serve as relay stations in the sky. The basic idea of satellite communications is that two stations on earth discuss via one or more satellites. So a little bit of satellite-related terminology: 1. Earth station is an antenna on or near the surface of the earth. 2. Uplink is a transmission from ...

The American Psychological Foundation (APF) Charles L. Brewer Award for Distinguished Teaching of Psychology recognizes an outstanding career contribution to the teaching of psychology. The 2011 recipient of the Distinguished Teaching Award is Neil Lutsky. Dorothy W. Cantor, president of the APF, will present the APF Distinguished Teaching Award at the 119th Annual Convention of the American Ps...

A growing fleet of NASA, commercial, and foreign Earth observing satellites (EOS) uses a variety of sensing technologies for scientific, mapping, defense and commercial activities. Image collection for these satellites is planned and scheduled by a variety of software systems using many techniques. Scheduling EOS is complicated by a number of important constraints, including: power and thermal ...

Ground-based pseudolite navigation systems have several limitations, such as low vertical accuracy, susceptibility to multipath effects, and near-far signal problems. These limitations could be addressed with an airborne pseudolite system. However, to ensure high user positioning accuracy the aerial signal transmitters have to be accurately positioned. Commonly used methods are based on the “in...

During the past several years, an interest has g r o w n i n u s i n g c o m m e r c i a l telecommunications techniques to supply Telemetry and Command (T&C) services. An initial study of this concept was performed for NASA in 1996[1]. Recently, the National Aeronautics and Space Administration (NASA) Space Operations Management Office (SOMO) has outlined plans to utilize satellite-based telec...

The Frame synchronizer code for IRS satellites is a PN sequence of 127bits. In the satellite data format the frame sync code has to be detected reliably and efficiently. During real-time when the serial data from satellite is being frame synchronized at ground station, there is a need of perfect frame synchronization at the ground otherwise the whole reference is lost. The frame synchronization...

An information system, called HelioClim, is available for answering the needs for long-term time-series of solar radiation data. Daily irradiation values are available over Europe, Africa and Atlantic Ocean, from 1985 onwards. This database is accessible through the Soda Web service (http://www.soda-is.com) on a free basis. Meteosat satellites images are used to produce this climatological data...