{"id":16372,"date":"2026-10-29T07:01:28","date_gmt":"2026-10-29T06:01:28","guid":{"rendered":"https:\/\/nolle.engineering\/?p=16372"},"modified":"2026-10-29T08:05:34","modified_gmt":"2026-10-29T07:05:34","slug":"elektro-l3-14-5w-first-l-band-images","status":"publish","type":"post","link":"https:\/\/nolle.engineering\/en\/2026\/10\/29\/elektro-l3-14-5w-first-l-band-images\/","title":{"rendered":"Elektro-L3 at 14.5\u00b0 W: First L-Band Images from Austria"},"content":{"rendered":"

On 26 October 2026 the Russian geostationary weather satellite Elektro-L No.3 switched on its L-band image downlink from its new position at 14.5° W. Two days later Markus Schieder, OE3HWC, sent us his first full-disk images, received in Wiener Neustadt, Austria, with a 100 cm offset dish and our 3-turn L-Band WX HRPT 1700 MHz feed<\/a>.<\/p>\n\n\n\n

Images and station photos by Markus Schieder, OE3HWC, reproduced with his permission.<\/em><\/p>\n\n\n\n

\"Elektro-L3
Elektro-L3 full disk in daylight, received at 1691 MHz in Wiener Neustadt. Image: OE3HWC<\/figcaption><\/figure>\n\n\n\n

Elektro-L3 at 14.5° W<\/h2>\n\n\n\n

Elektro-L satellites transmit full-disk images of the Earth on 1691 MHz as LRIT and HRIT, unencrypted and right-hand circularly polarised. Europe has had no usable source from this slot for years: Elektro-L No.2 sits at 14.5° W but never ran its LRIT\/HRIT service there because of power-supply problems. After Elektro-L No.5, launched in February 2026, took over the eastern slot at 76° E, No.3 left 76° E in September, reached 14.5° W in mid-October and started LRIT, HRIT and DCP transmissions on 26 October. Roscosmos has published little about the move; the timeline comes mostly from amateur tracking and reception reports.<\/p>\n\n\n\n

From 14.5° W the satellite covers Europe, Africa and the Atlantic. Seen from Central Europe it stands at roughly 28–30° elevation towards the south-west: about 28° from Wiener Neustadt, 29° from Munich, 30° from London, higher from southern Europe. It is geostationary, so the dish is aligned once and needs no rotator.<\/p>\n\n\n\n

The OE3HWC station<\/h2>\n\n\n\n

Markus uses our 3-turn WX HRPT feed in LHCP. A dish reverses the sense of circular polarisation, so a feed at the focus has to be LHCP to receive an RHCP satellite. The LNA, a Nooelec SAWbird GEOS, and the SDR, a Nooelec NESDR SMArTee, sit directly on the feed’s N connector inside our Electronics Cover<\/a>, so there is no cable loss in front of the LNA. A Raspberry Pi 4 in a weatherproof box at the dish passes the samples over 75 m of network cable to the shack, where SatDump decodes the images.<\/p>\n\n\n\n

\"Overview
OE3HWC receiving chain: 100 cm dish with feed and SDR, Raspberry Pi 4, 75 m network cable, SatDump in the shack. Image: OE3HWC<\/figcaption><\/figure>\n\n\n\n
\"SAWbird
SAWbird GEOS without its housing and NESDR SMArTee directly on the feed’s N connector. Photo: OE3HWC<\/figcaption><\/figure>\n\n\n\n

The feed sits in the dish’s LNB arm clamp. On many offset arms the clamp is close to the arm, and the feed reflector hits the arm before the feed is back far enough. The reflector has three rectangles marked for this case: cut out the one that fits the arm and the feed slides through. The phase centre of the helix is in roughly the lower third of the turns, not at the reflector plate. Put that point at the focus, then move the feed a few centimetres on the signal.<\/p>\n\n\n\n

\"WX
Feed with Electronics Cover in the arm clamp, reflector not yet cut out. In the final setup the cut-out lets the feed slide back into the focus. Photo: OE3HWC<\/figcaption><\/figure>\n\n\n\n

First images<\/h2>\n\n\n\n
\"Elektro-L3
Elektro-L3 full disk, false colour, received at 1691 MHz in Wiener Neustadt. Image: OE3HWC<\/figcaption><\/figure>\n\n\n\n
\"Elektro-L3
Natural-colour composite. Image: OE3HWC<\/figcaption><\/figure>\n\n\n\n
\"Elektro-L3
MSU-GS RGB 2-2-1 near the day\/night terminator. Image: OE3HWC<\/figcaption><\/figure>\n\n\n\n

What you need to receive Elektro-L3<\/h2>\n\n\n\n