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Hera telemetry
In my previous post I spoke about the recording I made of the X-band telemetry signal of Hera with the Allen Telescope Array shortly after it was launched. Despite the lack of publicly available...
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5G NR PBCH
This post is a continuation of my series about the 5G NR RAN. In these posts, I’m analyzing a recording of the downlink of an srsRAN gNB in a Jupyter notebook written from scratch. In this post I will...
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Tianwen-1 apoapsis raise
For a long time, AMSAT-DL has been using the 20 meter antenna in Bochum observatory to receive some telemetry from Tianwen-1, the Chinese Mars orbiter, almost daily. Since the telemetry includes the...
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Tianwen-1 second apoapsis raise
Some weeks ago I reported about an apoapsis raise manoeuvre done by Tianwen-1, the Chinese Mars orbiter. This has now happened again. Using state vectors from the telemetry decoded with the 20 m...
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Decoding IEEE 802.11ah
Since some time, I’ve been thinking about doing something similar to my posts about LTE and 5G NR, but for WiFi (IEEE 802.11). In these posts, I take a signal recording and write a Jupyter notebook...
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Decoding HYDRA-T
HYDRA-T is a PocketQube developed and operated by the Spanish start-up Hydra Space. It was launched on SpaceX’s Transporter 12 mission on January 12, and according to this news article (in Spanish),...
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Coding NEON kernels for the Cortex-A53
Some weeks ago, I presented at FOSDEM my work-in-progress high performance SDR runtime qsdr. I showed a hand-written NEON assembly implementation of a kernel that computes \(y[n] = ax[n] + b\), which...
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BGM-1 Doppler during the lunar landing
On Sunday March 2, Firefly Aerospace’s Blue Ghost Mission 1 successfully landed on Mare Crisium, becoming the first NASA CLPS mission to perform a fully successful lunar landing. Congratulations to...
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Decoding BGM-1 GMSK telemetry
In my previous post, I analyzed the Doppler of the Blue Ghost Mission 1 S-band telemetry signal during its lunar landing. The mission came to an end on March 16, as night fell on the landing site....
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Analysis of the CAMRAS Venus radar experiment
On March 22, CAMRAS performed a Venus radar experiment (or Earth-Venus-Earth bounce, as it is more commonly known in Amateur radio) in collaboration with Astropeiler Stockert, the Deep Space...
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