47 GHz stations

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Information on this page still needs to be improved

This is information about the 47 GHz EME stations with performance data.

In measuring Moon noise the best time to measure would be close to perigee, high elevation and a few days after full moon.
When I tried to find the best timing for moon noise measurement I found the VK3UM planner tool which predicts moon temperature.

It is clear that measurments on 47 GHz moon noise will vary quite a lot.
My suggestion would be to add the moontemp from the VK3UM planner tool to the measured performance.

Stations performance, I still need data on the red blocks, please send me your info. The list is arranged alphabetical by Callsign

List last updated: 13-12-2020; new data from JA1WQF with new pre-amp

Station

Antenna

Nf

Pwr

Sunnoise

Elevation /temp

Moonnoise

elev/temp/humid CS/G date of measurement using WG switch atm temp Moon temp Remarks
AD6FP 1.8 mtr offset 1.5 dB cooled   9.2 dB                  
DC7KY 2.4 mtr offset 2.2 @17C 1 9.5 dB 15 ? 0.69 dB       yes     Copied W5LUA
DL7YC 2.4 mtr 0.4 pf 2 dB 1 10.5 dB 50 deg 1.0 dB  60 deg     yes     Copied W5LUA
EA3HMJ new 1.2 mtr offset 2.6 dB 2 7.7 dB 43 deg 0.6 dB   64deg/11C/94%   6-10-2020

no

  274 K new LNA
EA3HMJ old 1.2 mtr offset 5 dB 2 5.8 dB 24 deg 0.31 dB  36 deg    

yes

     
JA1WQF 2.4 mtr cassegrain 1.65 dB 10 9.3 dB >27 deg 1 dB >27 deg 2.8 dB 12-11-2020 yes     Copied W5LUA
LX1DB 3.0 mtr 0,3 pf 2.2dB Spacek ? 7.1 dB 19C 63% 0.45 dB   0.8 dB          
OK1DFC 2.4 mtr offset 2.4 dB 0,1 7.7 dB 25deg/14C 0.77 dB 25 deg/8C/46%         253 K  
DL/PA0EHG 1.8 mtr 0.4 pf 2.5 dB 4 8.1 dB 22deg/13C tbd   1.5 dB 28-10-2020 no   K  
DL/PA0EHG old 1.8 mtr 0.4 pf 6 dB 4 6.4 dB 27deg / 5C 0.58 dB 25deg/12C/55% 0.8 dB 7-4-2020 no   261 K  
RW3BP 2.4 mtr offset 8 dB DSB   4.9 dB   0.6 dB             QRT
VE4MA 2 feet offset 4 dB ? 5.5 dB   0.3 dB              
W5LUA 2.4 mtr offset 2.85 25 8.2 45deg/28C 0.72 dB 60deg/28C/75%         228 K new LNA
W5LUA old 2.4 mtr offset 4 dB 25 6 dB   0.4 dB              
 

Explanation:

Table atm temp:
I have been working with a infrared thermometer to measure the temp of the atmosphere. I think this will give some extra information on atmospheric losses during the measurements/ The proposal is to measure during the 47 GHz measurements also the atmospheric temperature at the same angle and direction of the moon or the sun. I hope this will bring us closer to understanding atmospheric losses on 47 GHz for EME. Values can be seen between -20 or -30 during unclouded weather and low humidity in atmosphere but during clouded weather or unclouded weather with high humidity the measured atmospheric temperature will be much higher even up to the level of ground temperature. We can expect that losses on 47 GHz will be much higher than when we measure a atmospheric temp at -20 degrees Celsius.
Mind that some infrared thermometers will not measure these low values, a simple test in your freezer will show you if the infrared thermometer can be used.

Table moon temp:
The moon temperature is related to the sunshine on the moon and therefore directly related to the phase of the moon.
In VK3UM EME planner we can find the moon temp during the measurement, the proposal is to find this value and add this to the measured data. Up to now I have seen strong dependency on measured moon noise levels and moon temp, as might be expected.

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