1.1 - Radar Part
Radar Antennae (2 at 5 meters apart)
Diameter 2000 mm Focal Length 658 mm Source Type circular polarization Source Oscillator
Frequency 915 MHz or 1290 MHz Power Amplifier
Type solid state Protection any load or phase Power 20W (60W optional) Filter
Type band pass filter Bandwidth (at -3 dB) 3 MHz Rejection better than 60 dB Preamplifiers
Total Gain 39 dB Noise Figure 2 dB Mixer
Isolation LO/RF 20 dB min. Conversion Loss 8.5 dB max.
1.2 - Sodar Part
PA2 or PA5 antenna.
1.2 - Type of processing
By Fast Fourier Transform of the signal received after the mixing and use
of techniques similar to those developed for processing of the SODAR
signal.
2. - RASS/TOWER COMPARISON RESULTS
Tests were conducted at the K.F.K (Kernforschungszentrum Karlsruhe) in F.R.G during the month of March 1989. Since then more than 30 REMTECH RASS have been installed (see our customers reference list).
The initial comparison results show very good agreement with the 200-meter tower.
See figures below.
Temperature time series at 200 meters. The RASS temperature is in solid line.
The tower temperature is in dotted line.
Each point corresponds to a 30 minutes averaged value. The data correspond
to the period between March 10, 1989, 20HOO and to March 13, 1989, 17HOO.
RASS and tower profiles the llth of March 1989 at 11HOO. The temperatures are
given in tenth of Celcius degrees. RASS temperature is given in solid line. Tower temperature is given in dotted line.
RASS COMPARED TO TOWER DURING DAY
(7hOO to 19hOO)
HEIGHT N DT C SDev Corr 100 239 -1.02oC 1.09oC 0.38oC 0.975 160 214 -0.32oC 0.52oC 0.41oC 0.972 200 198 -0.32oC 0.54oC 0.44oC 0.965
RASS COMPARED TO TOWER DURING NIGHT
(19H00 to 0HOO and 0H00 to 7H00)
HEIGHT N DT C SDev Corr 100 221 -1.22oC 1.30oC 0.46oC 0.964 160 207 -0.34oC 0.45oC 0.30oC 0.983 200 194 -0.16oC 0.36oC 0.32oC 0.983
N : Number of points
DT : Bias or averaged difference of temperature between RASS and tower
C : Comparability or root mean square difference of temperature
SDev : Precision or standard deviation of difference of temperature between
RASS and tower
(C2 = SDev2 + DT2)
Copyright(c) 1997-2007 Remtech Inc. Updated: 11/2007
