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Related Experiment Video

Updated: Jun 13, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Rocket-borne submillimeter radiometer.

A E Lange, S Hayakawa, T Matsumoto

|May 11, 2010

Summary

This summary is machine-generated.

A rocket-borne absolute radiometer was built to measure sky brightness. Instrument performance was good, but a lid malfunction prevented data collection on its first flight.

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Area of Science:

Astrophysics
Cosmic Microwave Background Radiation
Infrared Astronomy

Background:

Understanding the diffuse brightness of the sky is crucial for various astrophysical studies.
Previous instruments have limitations in measuring broad sky brightness with high precision.

Purpose of the Study:

To test the performance of a novel rocket-borne absolute radiometer.
To measure the diffuse sky brightness in six passbands from 100 micrometers to 1 millimeter.

Main Methods:

A rocket-borne absolute radiometer was employed.
The instrument featured a horn antenna and photometer cooled to 1.2 K using liquid helium-4.
Measurements were planned across six specific wavelength bands.

Main Results:

The radiometer instrument itself performed satisfactorily during the rocket flight.
A critical failure occurred where the lid covering the horn antenna did not open.
Consequently, no astrophysical data were acquired during this flight.

Conclusions:

The developed radiometer technology shows promise for future sky brightness measurements.
Further flights are necessary to validate the instrument's capabilities and collect scientific data.
A similar apparatus is scheduled for a subsequent flight in 1986.