DTUsat-2 2.4GHz の件で、非常に有益な助言を得ました。(後刻翻訳)
下段の View it here: *** の部分は、具体的なアドレスが書いてありましたが
アンテナ群はすごいですね。 4本のスタックアンテナが 2.4GHz と思われます。
Re: Re^2: DTUsat-2 2.4GHz received !
To: Mineo Wakita
Date: Mon, 28 Sep 2015 23:23:38 +0000 (UTC)
Thank you for the email. I have attached a photo of my antennas.
Please try SatPC32 to control your TS790S by computer.
A fully operational demonstration version is at:
Total Doppler is 100 KHz over complete pass on 2.4GHz.
Manual tracking is difficult.
I believe your calculation of 2401.843MHz is very near correct.
It is not 2401.835MHz.
I am using a surplus AIDC 3733 downconverter at the antenna.
I get a down conversion error. For example, the outside temperature
at my QTH changes 10C to 21.1C from 8:00 AM to Noon. This affects
the crystal at the antenna. At 13.3C, my center frequency is 2401.838MHz,
but at 21.1C, my center 2401.841MHz.
I sample the temperature, then I change the center frequency inside
the program. I am sure your new converter does not have this problem.
73, Mike, K9QHO
----- Original Message -----
Subject: Re^2: DTUsat-2 2.4GHz received !
From: Mineo Wakita
Sent: Saturday, September 26, 2015 10:27:23 PM
Hello Mike, K9QHO.
My 2.4GHz system:
HGL2429(Loop 29ele), GR-2400(Amp), GRX-2402D(Converter), TS-790S
Converter Example: 2401.850MHz -> 145.850MHz
I have set the frequency by hand to TS-790S (KENWOOD).
The frequency is computed in real-time Doppler shift using the
Excel file that I wrote, which is synchronized with CALSAT32,
the tracking software. I set by hand the frequency to see the
calculated frequency instantly.
The nominal frequency is 2401.835MHz, but I think that is around
2401.843MHz. This frequency is not accurate because I observed in
the large Doppler Shift. Do you know the exact center frequency?
Do you receive by setting the frequency to what MHz?
JE9PEL, Mineo Wakita
Michael K9QHO has shared 3 items with you
To: Mineo Wakita
Date: Mon, 28 Sep 2015 19:37:49 -0400
Michael L Williams has shared 3 items with you.
View it here: ******
The three items are:
1. Typical audio file of DTUsat-2 dated September 28.
This section runs from 2:30 to 6:30 of the pass.
Partial beacon at 0:29, 2nd partial beacon at 1:00.
Full beacons at 2:02, 2:33, 3:13.
2. Printed summary of pass. The audio file contains the partial
beacons at 2:59, 3:30 and full beacons at 4:33, 5:03, 5:43
on the summary sheet.
3. Video of SatPC32 controlling Turning on FT-847 for Doppler
of DTUsat-2 on 2.4GHz.