Correct up-link frequency for PO-101 (Diwata-2)
On the AMSAT FM Satellite Frequency Summary it lists the up-link frequency for PO-101 (Diwata-2) as 437.500 MHz. On the PHL Microsat website, the up-link frequency is listed as 437.7 MHz.?? Which is correct??? I tried to work PO-101 during Field Day yesterday and had no success getting in with my radio set to 437.500 MHz, and Doppler-shift adjusted near values.?? Of course, being Field Day, I could have just been 'out-gunned'. I do wonder, though.
73,
Mac / AE5PH
Hi,
I think the problem started from this "official" site[1] where the frequency is listed as 437.700 MHz.
According to the twiiter account of Diwata-2 satellite[2] this is an old site and needs update.
The right frequency is the one coordinated by IARU[3] and also listed in the description of the twitter account of Diwata-2[4] and it is indeed 437.500 MHz.
73, fredy
[1] https://phl-microsat.upd.edu.ph/diwata2 [2] https://twitter.com/Diwata2PH/status/1140257484965199872 [3] http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=593 [4] https://twitter.com/Diwata2PH
On 6/24/19 6:33 AM, Mac A. Cody via AMSAT-BB wrote:
On the AMSAT FM Satellite Frequency Summary it lists the up-link frequency for PO-101 (Diwata-2) as 437.500 MHz. On the PHL Microsat website, the up-link frequency is listed as 437.7 MHz.?? Which is correct??? I tried to work PO-101 during Field Day yesterday and had no success getting in with my radio set to 437.500 MHz, and Doppler-shift adjusted near values.?? Of course, being Field Day, I could have just been 'out-gunned'. I do wonder, though.
73,
Mac / AE5PH _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
I've used 437.500 as the center uplink frequency on the three PO-101 passes that I've worked to date. On all passes, I was able to get into the bird with 5W or less. On the second pass, I had the bird all to myself, and I was able to get in well with 0.5W, at least with no competition.
73, Ryan AI6DO
On Sunday, June 23, 2019, 8:35:26 PM PDT, Mac A. Cody via AMSAT-BB amsat-bb@amsat.org wrote:
On the AMSAT FM Satellite Frequency Summary it lists the up-link frequency for PO-101 (Diwata-2) as 437.500 MHz. On the PHL Microsat website, the up-link frequency is listed as 437.7 MHz.?? Which is correct??? I tried to work PO-101 during Field Day yesterday and had no success getting in with my radio set to 437.500 MHz, and Doppler-shift adjusted near values.?? Of course, being Field Day, I could have just been 'out-gunned'. I do wonder, though.
73,
Mac / AE5PH
participants (3)
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Alfredos (fredy) Damkalis -
Mac A. Cody -
Ryan Noguchi