Information on this page still needs to be improved
This is information about the 47 GHz EME stations with performance data.
On 25-8-2024 the first ever CW QSO on 47
GHz EME was made
At 08.05 UTC the first ever CW QSO
between RW3BP and DL7YC succeeded with report 529 and 539
System in use
RW3BP
2.4 mtr
offset dish
nF =
1.2 dB
30 Watt from a home made sspa
DL7YC
2.4 mtr 0.4 prime focus
dish
nF = 1.3 dB
42 Watt from a TWT
System at RW3BP
The Dish at RW3BP
Dual Feed switching between TX and
RX
and pre amp by RW3BP
Feed with SSPA with water cooling
System at DL7YC
The Dish at DL7YC, using EGIS gearbox
Feed and feedbox with
TWT in front of dish
Feedbox, dish aimed at the sun,
TWT power supply in waterproof kissen box
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:
17-09-2024; added data
from CT1DMK
Setup from Miguel CT1BYM with 90 cm Kathrein dish
New results from CT1BYM with 1.2 mtr Kathrein offset dish
Gibertini dish EB3FRN with modified construction
Kathrein Dish CAS120 from EA3HMJ , weatherproof setup for RX system
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
CT1BYM old
0.6 mtr
offset
1.8 dB
6.2 dB
51 deg/26C
0.5 dB
37deg/15/98%
1.9dB
7-6-2022
no
-26 @37 elev
221 K
Kathrein CAS60
CT1BYM
0.9 mtr
offset
1.8 dB
9.4 dB
76deg/ 28C
0.9 dB
37deg/28/70%
2.3dB
29-6-2022
no
-28 @ 90 elev -16 @
50elev
221K
Kathrein CAS90 copied DL7YC
CT1BYM
1.2 mtr
offset
1.8 dB
11.4 dB
53deg/28C
1.4 dB
xxdeg/28/70%
2.3dB
17-9-2022
yes
-16
221K
Kathrein CAS120
copied DL7YC
CT1BYM
1.2 mtr
offset
1.8 dB
11.8 dB
52 deg/27C
1.65 dB
44 deg/18/83%
2.3dB
8-7-2023
yes
-7
221 K
Kathrein CAS120 copied RW3BP
CT1DMK
2.6 mtr
offset
3.5 dB
lna in progress
5 W
TBD
TBD
TBD
TBD
TBD
-
-
-
coming soon
DC7KY
2.4 mtr
offset
2.2 @17C
18
9.6 dB
15 ?
1.0 dB
3 C/62%
yes
Copied W5LUA
worked DL7YC
DL0SHF
2.8 mtr
tbd
tbd
TBD
TBD
TBD
TBD
Still optimizing
DL7YC new
2.4 mtr
0.4 pf
1.3 dB
42
12.5 dB
37 deg/26C
1.7 - 2 dB
24-8-2024
yes
Copied W5LUA,
worked DC7KY, VE4MA, RW3BP
DL7YC old
2.4 mtr
0.4 pf
2 dB
42
12 dB
38 deg
1.2 dB
33 deg/3/62%
15-4-2022
yes
EA3HMJ new dish
1.2 mtr
offset
1.8 dB
2
11.7dB
54 deg/21C
1.5 dB
50,4deg/11/20%
-
6-4-2023
yes
-21
262 K
Kathrein CAS120
EA3HMJ
1.2 mtr
offset
1.8 dB
2
9.8 dB
70
deg/30C
0.8 dB
64deg/30C/30%
22-6-2022
yes
11
247 K
copied DL7YC
EB3FRN
1.5 mtr
offset
1.8 dB
11.5 dB
>60deg/34C
1.5 dB
>50deg/33C/26%
23-7-2022
no
-16
-
Gibertini dish
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
copied DL7YC
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
copied DL7YC
PA7JB
60 cm
offset
5.5 dB
-
4.2 dB
7-6-2024
Kathrein CAS60
PE1CKK
0.6 mtr
offset
6 dB
4.2 dB
0.3 dB
Kathrein CAS60
DL/PA0EHG
1.8 mtr
0.4 pf
2.5 dB
4
10.1 dB
59deg/21C
0.8 dB
40 deg/21/45%
1.5 dB
5-7-2022
no
9.5@59 elev
207 K
Precision Industries
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
Precision Industries
RW3BP
2.4 mtr
offset
1.2 dB
30 sspa
15.25dB
51deg / 12C
3.06 dB
46deg/2.6C/75%
3.83 dB
10-5-2024
no
QRV again 30 Watt
VE4MA, W5LUA, AD6FP, K6YX worked DL7YC
UR3VKE
1.8 mtr
offset
1.7 dB
-
10.5 dB
1.2 dB
6-7-2023
yes
copied DL7YC
VE4MA
2.4 mtr
offset
2.1 dB
30
9.5 dB
40deg/20C
0.85 dB
12-7-2023
yes
QSO'd RW3BP,AD6FP,W6YX,
DL7YC
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
copied DL7YC
W5LUA old
2.4 mtr
offset
4 dB
25
6 dB
0.4 dB
feedbox with TWT 40 Watt at feed from DL7YC
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.
