NOAA POES High Resolution Picture Transmission (HRPT)

From Signal Identification Wiki
Jump to: navigation, search

High Resolution Picture Transmission (HRPT)
Frequencies 1698 MHz,1702.5 MHz,1707 MHz,2247.5 MHz
Frequency Range 1698 MHz - 2247.5 MHz
Mode RAW
Modulation PSK
Emission Designator
Bandwidth 3 MHz
Location Worldwide
Short Description A digital link to transmit images and other data collected from the satellite at a high resolution.
I/Q Raw Recording
Audio Sample

The NOAA POES series of satellites transmit high resolution pictures from the AVHRR (main radiometer) and additionally, data from AMSU (Advanced Microwave Sounding Unit), HIRS (High-resolution InfraRed Sounder), SEM (Space Environment Monitor) and, for NOAA 19 only, MHS (Microwave Humidity Sounder) instruments over an HRPT link.

The signal is PSKPhase-Shift Keying modulated at 665 kbit/sKilobits per second (kbps).

The main payload of HRPT is AVHRR data composed of six channels in the visible, near-infrared and infrared spectrum; only five of those can be transmitted together at a given time.

The data are digitized to 10-bit precision and transmitted at 360 lines per minute (LPM) at 665 kilobits per second (kbpsKilobits per second (kbps)). The HRPT data stream also includes non-imagery data from other instruments on board the spacecraft.

Data transmitted[edit]

  • 6 channels from AVHRR radiometer (5 at the same time)
  • 15 channels from AMSU-A sounder
  • 20 channels from HIRS sounder
  • 5 channels from MHS
  • Data from SEM (Space Environment Monitor)
  • Data from TIP (TIROS Information Processor)
  • Spacecraft RTC (Real Time Clock)
  • Spacecraft telemetry and monitoring (TLM)

Signal characteristics[edit]

  • Right-hand circular polarization
  • Phase shift keying modulation
  • 3 MHzMegaHertz (MHz) 10^6 Hz bandwidth
  • Transmit power 7 watts (1.5 watts for NOAA 15)

Satellites transmitting HRPT[edit]

L band[edit]

Satellite Frequency Notes
NOAA 15 1702.5 MHzMegaHertz (MHz) 10^6 Hz Very weak
NOAA 18 1707 MHzMegaHertz (MHz) 10^6 Hz
NOAA 19 1698 MHzMegaHertz (MHz) 10^6 Hz

S band[edit]

Since early 2023 all satellites have begun transmitting HRPT on the S band transmitter N°4 (STX4) at full power. This is to be considered experimental and subject to change.

Satellite Frequency Notes
NOAA 15 2247.5 MHzMegaHertz (MHz) 10^6 Hz Will switch to GAC over Fairbanks, Alaska
NOAA 18 2247.5 MHzMegaHertz (MHz) 10^6 Hz
NOAA 19 2247.5 MHzMegaHertz (MHz) 10^6 Hz

Baseband recording[edit]

Decoding Software[edit]

Decoding Tutorials[edit]

Additional Links[edit]

Additional Images[edit]