Beschreibung
What it does
A 10-turn RHCP helix tuned to 1700 MHz. Decodes HRPT (High Resolution Picture Transmission) downlinks from NOAA POES and MetOp weather satellites in LEO when mounted on an el/az rotor. With an offset dish (3-turn front-end variant), the same tuning also receives the L3 downlink from Russian Elektro-L geostationary weather satellites — a deployment we run as a public WebSDR.
Specifications
| Parameter | Value |
|---|---|
| Center frequency | 1700 MHz (1690–1710 MHz HRPT band) |
| Polarization | RHCP (default) — LHCP available on request |
| Helix turns | 10 |
| Connector | N-type |
| Mount | 6 × M4 bolts (universal) for el/az rotor; 40 mm LNB clamp adapter for dish use |
| Material | PETG, UV-resistant |
| Color | Orange/White (default), Custom on request |
Live reception demo
The Lab WebSDR exposes live downlinks from this antenna. A separate WebSDR feed for Russian Elektro-L3 (geostationary, 76°E) using a 3-turn front-end on an offset dish is currently offline for maintenance — when restored it goes back into the same WebSDR multi-feed page.
Typical use cases
- NOAA-15/18/19 and MetOp-A/B/C HRPT decoding (with rotor tracking)
- Russian Elektro-L geostationary weather imagery (with offset dish)
- Spectrum monitoring 1690–1710 MHz
Compatible chain
Identical to the Inmarsat 10-turn — see L-Band Inmarsat 1525 MHz for LNA / SDR / mounting details.
Color options
The Color option applies to the 3D-printed parts only — the baseplate and rim. The radome pipe is always white, regardless of the Color choice.
- Orange/White — orange baseplate and rim with the standard white radome pipe.
- Custom — custom color for the baseplate and rim. White is a valid choice; pick Custom if you want a uniform white antenna.
Documented in the Lab
- Lab overview — WebSDR feeds + station details
- L-Band Antenna Updates
Custom polarization or color combinations available on request — please use the contact form for a quote.
