Application Status 
"LOU StAÇUS 
Passive Microwave 
Instrument status 
  
Several microwave radio 
Space and ongoing investigat 
of the Skylab Earth Resource 
meters have now 
ions. > Two micro 
Electronicall 
the Nimbus-5 weath 
is a 5-channel mic 
y Scanned Microwave Radiome 
er satellite (Mix, 1974); 
rowave spectrometer 
31.4, 53.6, 54.9 and 58.8 GHz 
The Russian Cosmos- 
at 37.5 GHz (0.8 em), 22.2 CHz (1.35 cm), 
(8.5. cm). Soviet scientists have analyzed 
stalled in aircraft at 37.5 GHz (0.8 cm), 
(1.6 cm), and 9.4 GHz (3.2 Cm); also at 10 
and 1.0 GHz (30 Cm). Experiments on radia 
Soils were conducted in 1973 at 37.5 GHz 
243 satellite was e 
American investi 
radiometers installed 
used a multifrequency 
Research Center in ice 
gators have analyzed data f 
in NASA aireraft. 
UHF radiometer develo 
30 
A EE RA AER RAE. 
  
    
  
  
   
     
    
   
      
    
     
      
   
    
     
   
    
ice conditions and 
The Skylab RADSCAT data 
performed Successfully from 
Wave experiments 
ter (ESMR) was installed on 
also onboard the Nimbus-5 
(NEMS) viewing nadir at frequencies 
- Nimbus-6 ESMR includes a dual 
polarized antenna array. 
quipped to measure radiation 
8.8 GHz (3.4 cm) and 3.5 GHz 
data from radiometers in- 
22.2 GHz (1.35 cm), 18.8 GHz 
.0 GHz (3 cm), 30 GHz (1.0 cm) 
tion measurements of moist 
(0.8 cm) and 8.8 GHz (3.4 cm) 
(Basharinov and others, 1974). 
rom a number of 
Canadian investigators have 
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