Kein Folientitel

1
1st MsMs Steering Committee Meeting JRC, Ispra,
Italy, 11 Mai 2001 DLR Microwave Radiometer
Measurements 13-17 November 2000 Markus Peichl,
Stephan Dill, Helmut Süß DLR, Oberpfaffenhofen,
Germany
2
Overview

• Short introduction to microwave radiometry
• Measurement setup and conditions
• Results
• Summary and conclusions

3
Microwave radiometry?
Measurement of the naturally generated thermal
radiation power of matter using the variation of
dielectric properties at microwave frequencies.
4
Measurement setup - radiometer receiver
5
Measurement setup - receiver performance
6
Measurement setup - radiometer mount
7
Measurement setup - ambient conditions
8
Measurement setup - rain protection
9
Measurement setup - the team
10
Results of the sand subplot 3A
238 254 242 220 K
149 155 163 136 K
11
Results of the grass subplot 1A
244 268 273 222 K
141 179 183 134 K
12
Results - comparison to theoretical model
predictions
13
Summary and conclusions

• Two subplots (grass 1A, sand 3A) have been
  measured at four MW frequencies.
• The ambient conditions due to strong persistant
  rain were extremely unsuitable
• for mine detection.
• The low MW frequency signatures allow partly the
  detection of buried objects.
• Comparisons to theoretical model predictions
  allow a coarse explanation of the
• observed physical phenomena.
• Extensive measurements under normal ambient
  conditions are planned.