Michael Margaras

[Michael Margaras @SV1CAL]

Just finished copper plating my 3D printed 8 GHz dual mode feed ! I plan on using it for X-Band weather sat reception. This is a down-scaled / resimulated version of the 1296 MHz W2IMU/N2UO dual mode septum feed.

[Michael Margaras @SV1CAL]

Landsat 8 , 2282.3 MHz , 8:42 UTC
Simultaneous RHCP / LHCP RX.
A GRC flowgraph streams over UDP to two SatDump instances.

[Michael Margaras @SV1CAL]

NOAA 20 , AOS 10:30 UTC, 7812 MHZ

[Michael Margaras @SV1CAL]

@petermeteor Thanks a lot Peter !

[Michael Margaras @SV1CAL]

NOAA 21, AOS 10:53 UTC, 7812 MHz
Dust plume travelling towards Greece is clearly depicted affecting visibility and air quality in Athens today.

[Michael Margaras @SV1CAL]

Experimenting with S/X feeds, now replacing the S band patch with a precisely cut FR4 board . The ground plane has the phasing circuit on the back. All feeds below employ 3-point sequential feeding. Showing two single pol (L and R) feeds and a dual simutaneous L+R one.

[Michael Margaras @SV1CAL]

Working on a dual S/X feed supporting simultaneous RHCP/LHCP RX . There are 2x S band BPFs, 2x LNAs connected to Lime's Ch1/Ch2. A simple GRC flowgraph streams over UDP to 2 SatDump instances.
The coupler/120 deg phase shifter has been based on Maarten Baert's inspiring work.

[Michael Margaras @SV1CAL]

@f1aia_jclaude Thanks Jean-Claude! Testing a bit the setup every now and then :-)

[Michael Margaras @SV1CAL]

FENGYUN 3D, AOS 12:49UTC, 7820 MHz

[Michael Margaras @SV1CAL]

AQUA , AOS 12:34 UTC , 8160 MHz

[Michael Margaras @SV1CAL]

Metop-B, AOS 07:10 UTC
Metop-C, AOS 07:55 UTC

[Michael Margaras @SV1CAL]

@f1aia_jclaude Thanks Jean-Claude !

[Michael Margaras @SV1CAL]

L band RX after a while ...
Metop-B, AOS 07:31 UTC, 1701.3 MHz

[Michael Margaras @SV1CAL]

@PatrickPierre73 You are welcome ! Best 73 !

[Michael Margaras @SV1CAL]

CQ ARI EME CONTEST

[Michael Margaras @SV1CAL]

@petermeteor @redplanet00 Never too late ! Happy Birthday!

[Michael Margaras @SV1CAL]

@aang254 Cool ! Just found the pictures you posted on Matrix . FB 73

[Michael Margaras @SV1CAL]

Working on a dual S/X feed supporting simultaneous RHCP/LHCP RX . There are 2x S band BPFs, 2x LNAs connected to Lime's Ch1/Ch2. A simple GRC flowgraph streams over UDP to 2 SatDump instances.
The coupler/120 deg phase shifter has been based on Maarten Baert's inspiring work.

[Michael Margaras @SV1CAL]

@uhf_satcom Thanks! Yes a septum , X band is pretty straightforward as I have already been using an L/X feed. The goal here was to have both polarizations simultaneously R/L on S band.

[Michael Margaras @SV1CAL]

NOAA 18, 2247.5 MHz, AOS 0916 UTC

[Michael Margaras @SV1CAL]

Following up , some more details and a link to the grc file have been uploaded to my page. Please see below:
https://t.co/5EyG6SSpUk

[Michael Margaras @SV1CAL]

Experimental HRPT 1.7 GHz setup with a simple honey-can feed and 2 probes for linear orthogonal polarization.
Then V/H components are combined in a GNU Radio flowgraph to form RHCP/LHCP.
There are sliders to adjust gain and phase differences.