jul 6 2020
Low power telemetry. Also received JO-97 and EO-88 today with good result.
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jun 21 2020
In June 20 (2020) the CAS-6 satellite was activated. As reported by many it is only active for 1 sec in 7 sec interval. It can be seen in the beacons, both CW and GMSK.
I hope this can be fixed – CAS-6 is very strong on downlink and it can be a nice ham radio satellite.
• CW Telemetry Beacon: 145.910 MHz
• AX.25 4.8kbps GMSK Telemetry: 145.890 MHz
• U/V Linear Transponder Downlink: 145.925 MHz, 20 kHz bandwidth, inverted
• U/V Linear Transponder Uplink: 435.280 MHz
jun 10 2020
This is same pass from AO-92 at 20 degree elevation, decoded by my SatNOGS station and my “big” setup with tracking yagis. Good to see that the yagis makes a huge difference. Note: I’m not sure about the difference in data frames between the programs.
jun 9 2020
A V-dipole for NOAA weather satellites on 137 MHz has been published by 9A4QV and it seems to get very good results. I decided to build one for UHF 436 MHz satellite band and also add reflectors to get the antenna pattern higher up.
I followed the instructions by 9A4QV but adjusted to 436 MHz. All SWR measurements are done with a NanoVNA. Please see the pictures below for some ideas how to build one of you own. You can also see test results below.
I have used the following materials:
Some pictures from building
When listening to local repeaters a got good readings, but when trying to receive satellites I did not get the result I think this type of antenna should deliver. I think it is a better antenna for the high power NOAA satellites on 137 MHz. But, it´s very simple to build!