Category Archives: Projects

AERO-I 600 Baud GMSK

Currently there are 9 AERO-I 600 Baud GMSK channels on POR. Quite a bit of ACARS and CPDLC traffic along with the usual Call Management signaling units. These signals are huge as you can see from the “tightness” of the … Continue reading

Posted in Inmarsat, Projects Tagged

Control Software for AOR AR2300

The AOR AR2300 is a PC Controlled All-Mode Communications Receiver that spans 40kHz to 3.15GHz. Since the radio is simply a black box with no front panel one must either use the software that comes with it or roll your … Continue reading

Posted in Projects Tagged

SP5T Microwave Switch

Too many signals on different bands and tired of manually changing feed lines? Mini-circuits has a nice line of RF Matrix Switches that are USB controlled. I recently acquired a USB-4SPDR-A18 and have now finally gotten around to mounting and … Continue reading

Posted in Projects Tagged

New Inmarsat Aero-H and H+ Decoder in Development

Another new decoder project is in the works. This is another Multi-Channel decoder for Aero but instead of just ACARS and CPDLC it does AMBE and LPC voice decode. The screenshot below shows call logging status output from the prototype … Continue reading

Posted in Inmarsat, Projects Tagged ,

Antenna Tracking Software Updated

I developed this little application a couple years ago to manage shuttle passes for automated s-band reception/recording. I have started using it more for DSN now and so have updated it with some new features. The tracker gets it’s Ephemeris … Continue reading

Posted in Projects, Spacecraft Tagged

Inmarsat Aero-P ACARS Multi-Channel Decoder

Inmarsat Aero-P includes an ACARS service for airlines to use while transiting the various ocean regions. This is much more reliable than HF ACARS. Inmarsat hosts 3-4 Aero-P control channels on L-Band for each ocean region. Each control channel is … Continue reading

Posted in Inmarsat, Projects, SATCOM Tagged ,

Multi-Channel Inmarsat-C Decoder

Below is graphical overview of Marine-C, an Ethernet based Multi-Channel Inmarsat-B decoder. The decoder is able to simultaneous decode up to 12 channels and therefore can cover an entire ocean region with this single application. The decoder monitors all LES … Continue reading

Posted in Inmarsat, Projects Tagged

Multi-Channel Inmarsat-B Decoder

Below is a graphical overview of Marine-B, an Ethernet based Multi-Channel Inmarsat-B decoder. Below is a more detailed block diagram of multi-channel decoder with a few screenshots of operational logging and FFT waveforms. Marine-B is a fully automatic frequency agile … Continue reading

Posted in Inmarsat, Projects Tagged

New Hardware for some new Software

I have been working on some new decoding software that directly interfaces to RF Space SDR-IP or NetSDR. These SDR’s provide wide-band IQ data over Ethernet and are ideal for plug and play operation. All the new decoders are multi-channel … Continue reading

Posted in Inmarsat, Projects Tagged

Energy Monitoring

Each month i’m amazed at the total energy spend, so I think it might make sense to start monitoring things to understand where all the power is going. I settled on a Brultech ECM-1240 system. The system is made up … Continue reading

Posted in Projects Tagged