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en:lesson08

Cubsats beacons

A beacon is called a periodically transmitted signal (once a minute or so), which contains the name of the spacecraft (call sign) and the most important telemetry - the voltage of the onboard power supply, the state of the batteries and solar panels, the temperature of various points of the device, and so on.

The following software is used to receive lighthouses from cubsats:   * SDR # for receiving a radio signal;   * Orbitron for tracking the satellite and taking into account the Doppler effect;   * Hs soundmodem for receiving command codes;

Launch SDR # and select the type of radio: RTL-SDR connected via USB.

In the Radio section, set the switch to WFM mode and set the Bandwidth to 12000.

Make sure the “Filter Audio” checkbox is unchecked.

Next, you need to increase the signal gain. To do this, click on the gear.

Move the slider so that the noise level rises by about 10dB.

This is what the kubsat lighthouse should look like.

In the Tracking DDE Client section, when Orbitron is connected correctly, information about the tracked satellite will appear.

Launch Orbitron and update TLE first. Click on the tool button.

Press the zipper button to update the TLE.

Then select the weather satellite information file.

Click the Download TLE button.

Download the cubesat.txt List

In the side list on the right, only cubsats will appear. Select Aausat 4, BeeSat 2, Beesat 4, GOMX1, LilacSat2.

The selected satellites will be shown in the main program window.

Then go to the Calculation tab and click on the Calculation button.

The satellite will automatically calculate the time of flight. Go to the Rotor / Radio tab and make sure the tracking button is pressed.

In the window with the receive frequency (Dnlink / MHz) the following correct frequency should be set:    * BEESAT-2 435.950 MHz    * GOMX-1 437,250 MHz    * AAUSAT-4 437.425 MHz    * BEESAT-4 435.950 MHz    * LilacSat-1 436.510 MHz

Launch HS soundmodem

Open the settings section

Select the audio source Input device - CABLE Output. Check the AGWPE Server Port Enabled checkbox. Additionally, you can check the Color waterfall checkbox.

To test the HS soundmodem, enable LitSat-1 satellite recording. To do this, follow the link https://yadi.sk/d/iYDiVeAEos0yPQ and enable the recording.

Set the sound volume to maximum so that the waterfall is of this color.

After some time, satellite telemetry should appear in the HS soundmodem program window.

Select the type of signal according to the type of cubesat received.

In preparing the lesson, materials from the site https://r4uab.ru were used

en/lesson08.txt · Last modified: 2020/08/31 15:37 by golikov

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