PORTABLE INTEGRATING SPHERE FOR MONITORING THE REFLECTANCE OF SPACECRAFT COATINGS
Portable integrating sphere for monitoring the reflectance of spacecraft coatings
RADIATION MEASUREMENT↗
SEARCH · Engineering Papers
Results for “Reflectometer”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
A silicon cell transmissivity-reflectivity meter for use with solar radiation
Silicon photovoltaic cell for measurement of transmittance and reflectance of transparent materials for solar radiation
TRANSPARENT MATERIAL↗
Development and use of a bidirectional spectroreflectometer.
Bidirectional spectroreflectometer for reflectance of solid and powder samples
SURFACE PROPERTY↗
The Radio Frequency Environment at 240-270 MHz with Application to Signal-of-Opportunity Remote Sensing
Low frequency observations are desired for soil moisture and biomass remote sensing. Long wavelengths are needed to penetrate vegetation and Earths land surface. In addition to the technical challenges of developing Earth observing spaceflight instruments operating at low frequencies, the radio frequency spectrum allocated to remote sensing is limited. Signal-of-opportunity remote sensing offers the chance to use existing signals exploiting their allocated spectrum to make Earth science measurements. We have made observations of the radio frequency environment around 240-270 MHz and discuss properties of desired and undesired signals.
Soil Moisture↗