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Re: AO-51
- Subject: Re: [amsat-bb] AO-51
- From: "Edward R. Cole" <al7eb@xxxxxxxxxxxxx>
- Date: Mon, 12 Jul 2004 22:30:28 -0800
Robert,
I had "no" reception until adding a 432 preamp, then even a ground-plane
antenna gave up to S-9+ signals...using a 6-elem yagi (Arrow) and getting
very good tlm copy....need auto-tune/auto-track for flawless copy as Echo
moves fast!
73's Ed - AL7EB
6-elem yagi, mgf-1402 preamp (25-dB gain), 60-foot RG-213, FT-847
At 10:35 AM 7/13/2004 +1200, Robert Thirkettle wrote:
>Hi
> I am interested in hearing about what equipment people are using
>to receive the 9k6 telemetry with.
>
>I am using a IC-706MK2 with a KPC 9612 plus and a 8 element yagi fed
>with 15 meters of 9913 coax it is pointed manually. The received signal
>is still not that very strong.
>
>I have a program that works out simple path losses and you find it
>aggress with what I am seeing from the bird some people that are not
>coping the sat I think the problem is not enough gain in their antennas
>plus probably to many losses in coax etc.
>
>Frequency MHz Distance KM Ant gain dB Power dBm Coax Loss dB
> 435 1500 0 28 2
>
>
>Total Loss in dBm
>-122.2916103
>
>As you see things get very marginal and with the sat over head a lot of
>antennas don't have a good capture. Below is some of the data I have
>captured.
>
>ACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > STATUS-0 :B: 2815360
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-12 > BBSTAT-0 :Open ABCD:
>PACB-11 > STATUS-0 :B: 2815360
>PACB-1 > TIME-1 :PHT: uptime is 008/07:36:14. Time is Sun Jul 11
>11:05:38 2004
>PACB-1 > TLMI-1 :<binary tlm>
>PACB-1 > TLMS-1 :C0:05 C1:44 C2:76 C3:27 C4:04
>PACB-1 > BCR-1 :BCR: batv=1306 bati=187 batsense=1366 battop=1306
>batlow=1306 batt1=561 batt2=1125 sav=62 sai=4
>
>PACB-1 > AMSATN-1 :July 11, 2004. PLEASE DO NOT TRANSMIT TO
>ECHO...AO-51 is NOT open for general use. First test of 38k4 downlink
>was successful. WD0E & KE4AZN
>PACB-1 > LSTAT-0 :I P:0x13AA o:0 l:29467 f:29467, d:0 st:0 e:01
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > STATUS-0 :B: 2815360
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-1 > TIME-1 :PHT: uptime is 008/07:38:14. Time is Sun Jul 11
>11:07:38 2004
>PACB-1 > TLMI-1 :<binary tlm>
>PACB-1 > TLMS-1 :C0:05 C1:44 C2:76 C3:27 C4:04
>PACB-1 > BCR-1 :BCR: batv=1298 bati=186 batsense=1367 battop=1298
>batlow=1298 batt1=557 batt2=1118 sav=60 sai=3
>
>PACB-1 > LSTAT-0 :I P:0x13AA o:0 l:29467 f:29467, d:0 st:0 e:01
>PACB-12 > BBSTAT-0 :Open ABCD:
>PACB-11 > STATUS-0 :B: 2815360
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-12 > BBSTAT-0 :Open ABCD:
>PACB-11 > PBLIST-0 :PB: Empty.
>PACB-11 > PBLIST-0 :PB: Empty.
>PACBLS-8 > PACBLS-8 :PACBLS S Meter = 55
>
>Regards Rob Thirkettle ZL3RX
>Dept Physics & Astronomy
>University of Canterbury
>Private Bag 4800,
>Christchurch 8020,
>New Zealand
>Tel: +64 3 364 2510
>Fax: +64 3 364 2469
>mailto:rob.thirkettle@canterbury.ac.nz
>----
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----
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