Composed by Naman // Claude
GS. — Observations from 26.85° N, 80.95° E
GEO-KOMPSAT-2A IR105 (10.3 μm) captured 2026-05-18 · 13:30Z
Plate I GEO-KOMPSAT-2A  ·  IR105 (10.3 μm)
Captured 2026-05-18 · 13:30Z  ·  1692.140 MHz  ·  SNR 12.5 dB Open full-resolution PNG ↗
A standing log of one instrument 2026-05-18

A dish. A satellite. A log.

A one-metre offset dish on a rooftop in Lucknow, pointed thirty degrees up and a hundred and twelve east of true. It listens to a single geostationary weather satellite and writes the pictures down.

On file
07
GK-2A
06
Polar
01
Pointing
112.6° / 29.6°
III

The instruments

Three chains
Diagram Featured chain: the L-band path pointed at GK-2A. Two more instruments listed on the dedicated page.
Rooftop · Lucknow NAS · /satellite I 01 Antenna 1 m parabolic az 112.6° · el 29.6° II 02 Feed 3-turn helix, RHCP 1692.14 MHz centre III 03 Front-end SAWbird+ GOES LNA + SAW filter, ext. PSU IV 04 Receiver RTL-SDR Blog V4 cu8 · 2.4 Msps V 05 Decoder SatDump v2.0.0-α pipeline · gk2a_lrit VI 06 Composite Sanchez v1.0.26.1 blue underlay · haze 0.6

Each plate is the output of one of three configured chains, run end-to-end without intervention. When a node breaks, the chain stops and the log entry says where.  See all three instruments →

IV

Operational log

Last 5 sessions
No. Captured Satellite Outcome Band SNR CADU Pipeline / Note
21 2026-05-19 · 02:10Z GEO-KOMPSAT-2A Decoded L 12.7 4772 KiB SatDump v2.0.0-alpha · Sanchez v1.0.26.1
20 2026-05-19 · 01:30Z GEO-KOMPSAT-2A Decoded L 12.1 4651 KiB SatDump v2.0.0-alpha · Sanchez v1.0.26.1
19 2026-05-18 · 17:19Z GEO-KOMPSAT-2A No lock L 0 KiB 5-second test capture from Pi. No CADU output, deframer NOSYNC, viterbi NOSYNC. Short duration likely insufficient for lock.
18 2026-05-18 · 14:39Z GEO-KOMPSAT-2A No lock L 0 KiB FREQUENCY ERROR: tuned 1691.000 MHz but GK-2A requires 1692.140 MHz (1.14 MHz low). Good signal quality at wrong freq, Viterbi locked but deframer failed. Pi script needs frequency correction.
17 2026-05-18 · 13:30Z GEO-KOMPSAT-2A Decoded L 12.5 4718 KiB SatDump v2.0.0-alpha · Sanchez v1.0.26.1

Full log — 21 sessions on file →

Sessions are logged in the order they completed — failed captures included. SNR is post-DC-block baseband estimate, not link-budget margin. The full archive lives on the NAS at /satellite/.processed-iq-log.ndjson; this table is the daily-refreshed projection.