This is the antenna feed for the #Biomass (Earth Explorer 7) mission. It powers a 12m dish at 435 MHz, likely using 6 MHz chirps with ~120W at the feed and 3kHz pulse repetition. It will be a fun signal to process.

Make Maneuvers Great Again! What’s a beautiful visualisation of the satellite close approach - must see!

FUN FACT J.J. Thomson won the Nobel in Physics in 1906 when he showed electrons were particles. 31 years later his son G. P. Thomson won the Nobel Prize in Physics in 1937 for showing that electrons are waves.

A major contribution to wave-particle duality. Perception of the nature of matter changed forever.

Mehdi My response is RF Cat. I built it for myself for out the office activities and then for my clients which saw it and discovered how useful is that. It is more expensive because of Microsoft Surface tablet but with 2736 x 1824 it is much more useful.

The RF Cat frame is a CNC machined, black aluminum plate. Under the vibration-isolated tablet unit is mounting plate to compose dedicated set of devices. Here SDRs AirSPY R2 and HF+. Simple, solid, lightweight with a frequency range that allows analysis of signals in the field.

A bit of RF teardown for SDR geeks. Two original Ettus USRP1 with four extensions cards which each can operate from 0.8-2.3 GHz.

In the past 3 days, two asteroids — 2025 PF2 and 2025 PU1 — passed closer than the geostationary satellites delivering our preseason #NFL games this weekend. #asteroid #astronomy

Here's a view from the Viking 1 lander on the Chryse Plains of Mars in 1976, and a view OF the lander taken from space by Mars Reconnaissance Orbiter, which is studying Mars today. science.nasa.gov/mission/mars-r…

Nice set of antennas! Anyone know and share details?

The Dwingeloo Dwingeloo Telescoop just observed pulsar B0329+54.

Do you remember when you joined X? I do! #MyXAnniversary

I think about this diagram a lot: youtu.be/X9NdUF6VysM?si…