The uhf and vhf are made by two separate chips. It's our belief after seeing some data, that our vhf might be dead on arrival to orbit.
On Wed, Jan 20, 2021, 12:40 PM PE0SAT | Amateur Radio [email protected] wrote:
Thanks for the information,
Looking at the data sheet there are a lot of options https://www.farnell.com/datasheets/2354976.pdf some details on configuration would be help full.
Jan PE0SAT
On 20-01-2021 18:43, Rizwan Merchant wrote:
Telemetry details will be formally published by us by sometime this weekend.
CAPE-3 is flying with an FM modulation with ax.25 frames, and FSK with a frame as specified by our radio chip AXSEM 5043. I'll try to pull the exacts off the datasheet and share it after work today.
Sincerely, Rizwan Merchant KF5BNL
On Wed, Jan 20, 2021 at 9:01 AM PE0SAT | Amateur Radio [email protected] wrote:
Good day Rizwan,
Where can we find details on the telemetry and modulations used by CAPE-3?
All the best,
Jan PE0SAT
On 19-01-2021 05:03, Rizwan Merchant wrote:
Hello all,
I am one of the industry mentors and former students from the University of Louisiana at Lafayette. I wanted to draft up this quick email with a few things that might have been overlooked in the excitement of the last 24 hours.
We've identified an issue with IARU listings of our frequencies. The listings contained a typo with regards to our UHF Radio. The below information is our satellite's configurations:
*UHF*: *Frequecy: *437.325 (originally published as 435.325) *Modulation and Baud Rates*: FSK 1200, 9600, and FM 1200 (AX.25)
*VHF*: *Frequecy: *145.825 *Modulation and Baud Rates*: FSK 1200, 9600, and FM 1200 (AX.25)
We have beacons transmitted every 15 seconds, and the beacons will alternate configuration, meaning we'll transmit:
Time 0s: UHF FSK 1200 Time 15s: UHF FSK 9600 Time 30s: UHF FM 1200
As of right now it is our belief the satellite is only transmitting on only the UHF. However we do not know for certain.
We have heard a few passes throughout the day from Lafayette, LA, and heard our UHF beacons transmitting, however we have not been able to decode yet, which brings me to my request:
Using the above information, if any one copies a packet from CAPE-3, please try to capture the hex string of our data and email it to me. We are looking to figure out the status of our satellite's health since launch.
Thanks so much for everyone's support, and assistance, we really appreciate it.
73
Sincerely, Rizwan Merchant KF5BNL
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-- With regards PE0SAT Internet web-page http://www.pe0sat.vgnet.nl/ DK3WN SatBlog https://www.satblog.info/ Online Telemetry Forwarder: https://db.satnogs.org/stats/ SatNOGS: https://network.satnogs.org/users/PE0SAT/ irc://chat.freenode.net #Cubesat - Twitter @pe0sat
Sent via AMSAT-BB(a)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!
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
-- With regards PE0SAT Internet web-page http://www.pe0sat.vgnet.nl/ DK3WN SatBlog https://www.satblog.info/ Online Telemetry Forwarder: https://db.satnogs.org/stats/ SatNOGS: https://network.satnogs.org/users/PE0SAT/ irc://chat.freenode.net #Cubesat - Twitter @pe0sat