Monthly Archives: June 2014

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 ,

ISEE-3 Frequency Drift Measured

Based on the latest Horizons update by JPL (based on Arecibo observations) I have measured the frequency drift of the spacecraft TX frequency (transponder A RHCP). It appears to be drifting upward at a rate of 3.3 Hz per hour. … Continue reading

Posted in Spacecraft Tagged ,

JPL Updates ISEE3 Horizon Data

Updated my Horizons data for ISEE-3 today and found this nice note: UPDATE (2014-Jun-23): Trajectory updated to JPL solution #32 (s32), based on 42 coarse Arecibo plane-of-sky angular measurements spanning May 22 – Jun 23 … Upon updating things and … Continue reading

Posted in Spacecraft Tagged ,

ISEE-3 Signal Getting Stronger

Each day the signal from the old but reliable ISEE-3 spacecraft gets stronger and stronger. I have updated the tracking software to log the signal strength over time. It’s also very easy to see the signal without averaging as shown … Continue reading

Posted in Spacecraft 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

Mars Orbiter Mission (MOM) Signal Detected

It’s been an S-Band weekend here. Earlier today the Indian Spacecraft MOM was picked up by DF2MZ as well as UHF-Satcom at a distance of 107 Million km! By the time the spacecraft rose over California Goldstone had locked it … Continue reading

Posted in Spacecraft Tagged

ISEE-3 (ICE) Spacecraft Detected

ISEE-3 (ICE) Spacecraft was detected today using a 1.2m dish at 2270.390831 MHz. The signal at this frequency was also simultaneously detected and confirmed by Paul over at UHF-Satcom. The detection was accomplished by integrating multiple FFTs with the spacecraft … Continue reading

Posted in Spacecraft Tagged ,

LRO on S-Band

The Lunar Reconnaissance Orbiter (LRO) is a nice S-Band (2271 MHz) signal coming from the moon to calibrate your dish. This is especially helpful if you need the accuracy for even higher frequencies where the beam-width is narrower. Below is … Continue reading

Posted in Spacecraft Tagged ,

Mars and Saturn in June

It’s getting hot and atmospheric conditions are not the best for astrophotography, however stacking 5000 images does help a bit with the variable focus. Tweet

Posted in Astronomy 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 ,