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.
