European Facility For Airborne Research

European Facility For Airborne Research March 4, 2024, 19:32

Instrument: DLR Eppley Precision Spectral Pyranometer

Name DLR Eppley Precision Spectral Pyranometer
Acronym Eppley-PSP-DLR
Manufacturer Eppley
Operated by DLR
Operated onboard

Instrument type

Name Broad Band Radiometer
Acronym BBR

Principle of operation

Measured parameter Hemispheric broadband radiance
Operating principle

Measures up-welling and/or down-welling incident radiation in visible/near infra-red

Measurement(s) Radiation

Dimension and weight

External dimension
Weight 1.0


Operating mode Remote sensing






Operational restriction

Operational requirements

Certification approvals

Additional information

The Eppley PSP is an instrument for the measurement of radiation in the range approximately between 285 and 2800nm. The official Eppley literature states that the Eppley PSP has a temperature dependence of plusmn;1 % over the ambient temperature range -20°C to 40°C.
The important components of the PIR are the :
-Thermopile: The thermopile of the PSP is designed to be sensitive to shortwave radiation. It is painted black to maximise heating, and has a sensitivity of about 9 µV/Wm-2. The thermopile surface can be considered an ideal black body.
- Transmittance Filter: It is comprised of two optical glass domes above the thermopile. The transmission spectrum is very flat and has a cutoff for wavelengths below 300 nm.
- Thermistors & Temperature Compensation Circuit: - Amplification Circuits

Access, host and processing


Could also fit on any aircraft having the following characteristics

General description

Back to top
Copyright © 2024 EUFAR All rights reserved.