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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