![]() ![]() ![]() As confirmed by Zac, this will be how the Sprite spacecrafts will transmit after launch. The binary 0s and 1s are modulated with two 511-bit Gold sequences before transmitted at 64kbps using MSK. Spread spectrum transmission will be on our new tracker, using Zachary Manchester implementation for project KickSat ( See here for project details ). We are expecting 30,000m altitude on both balloons. ![]() The second one will have THOR4, JT65 and WSPR on HF, and SSDV on UHF. The first balloon will have SSDV, RTTY, APRS and spread spectrum on VHF/UHF. PSB-6 and PSB-7 will be our first HAB releases of the year over the weekend of 18-, when we will launch two balloons from Southern NSW. GPS is a uBLOX MAX-7 Pico Breakout with Chip Scale Antenna Top side of FMPSB with the 25mw Radiometrix module and power inverter under side. We are hoping to involve enthusiast with tracking that are not necessarily radio hams. High altitude tests are still to take place to see how stable this frequency will be. I think we will also find some advantage in being able to quote a stationary frequency in order to detect the payload unlike the drifting we had with SSB. One of the reason to develop a payload on FM is to enable anyone with a scanner receivers to be able to participate with the tracking without having to use a SSB receiver. Our new FMPSB module is driven by a Teensy 3.1 ARM Processor using a Radiometrix NTX2 that transmits Thor 16 and FEC 1200, 4800, and 9600 FEC based on FX25, additionally the FMPSB can transmit APRS and SSDV. In FLDIGI it’s in the configuration item.Ībove all, have fun on the day ! Cheers /DD VK3TBCĪfter lots of development and testing our new FMPSB module has been performing fantastic! In the TNC program it’s the enable web logging checkbox. With both programs, you will need to set the call sign and lat,long (decimal degrees) and enable logging. On this payload, images will be transmitted using 1200 baud and 4800 baud. There is a mode that has been setup called SSDV. If you are coming out of the discriminator and you are not decoding the packets, then, tick this check box. There is a button to reverse the phase called “reverse”. You will need to adjust audio input levels so that it’s not too loud or too soft going into the application. This is because they sometimes insert pops and clicks which can wipe out a perfectly good data packet. Also, it is not recommended to use VAC for the higher speeds. All of these will add distortion to the data signal (audio will sound find, but the data waveform will be corrupted). With these modes, you need to turn off any extra sound card settings around AGC/ALC enhancements etc. 1200 will work from an audio out but the discriminator is still better. With higher baud rates, (especially 48) you need to come out of the discriminator of the radio (or use a dongle like FUNCUBE). To decode this you need the TNCEMULATOR program. You can download the balloon parameters of the flight (you need to be using the HAB version of FLDIGI) The balloon has been registered with HAB and will appear as MTG002. If you do not click on this configuration item, it will not search the entire passband. What this means is that, if you have incorrectly set where the frequency of the tones are going to be decoded from, it will automatically detect this and move the decoder where it needs to be. This will AutoDetect the Oliva and Thor modes and configure FLDIGI.Īlso, there is another configuration item in FLDIGI that searches the entire passband in FLDIGI for the RSID signal. For this to work on FLDIGI, you need to click on the RX RSID button top right panel of FLDIGI. The payload has a function that sends out a mode identifier (called RSID). Just a few tips on decoding for Saturday 25 th October 2014 based on observation and testing. Modes: Thor Telemetry, 1200 FEC Telemetry and SSDV, Olivia Telemetry, 4800 Telemetry and SSDV, 9600 Telemetry Balloon scheduled to release Saturday 25 th of October at 10:30am Location Ancona near Bonnie Doon Vic. ![]()
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