logo

ALL



Cluster Activity

Spots per uW band today:
UK spotter or spotted only.

Solar data:
SFI
2
A-Index
0
K-Index
12
Exp.K
qui
Sunspots
qui
Activity
no
GMF
Aurora?
M0DTS

My Weather

ArrayDate:12/07/20 Time:00:13
Temp:11.5C
Wind Speed:2.5mph
Wind Dir:247deg
Pressure:1026.57mB
Humidity:93%
Dew Point:10.1C
UKHASnet

I have been doing some radar tests on 3cm for a bit of fun, always wanted to do it but never got around to it!

Initial tests were with Pulsed operation which gave some reasonable results, main problem being de-sense from Tx noise getting into the Rx via the circulator i think.
Tests were with 1uS pulses of ~4W RF into 60cm dish, generates a fairly wide bandwidth signal as you can imagine!
A waveguide filter was fitted between the Transverter and Amplifier to clean this up a bit.

Rx was a PLL LNB after a PIN attenuator connected to a circulator.

Pulsed Block Diagram




A plot made with python script is here showing reflections at ~8-12km:

Radar Plot example



A basic version of the script produces this, script below:
Radar reflections example




radar_plot_echo.py
















Last page added:25/03/00 18:32
M0DTS.co.uk