The website is undergoing a major upgrade that began Friday, October 11th at 5:00 PM PDT. The new upgraded site will be available no later than Monday, October 21st. Until that time, the current site will be visible but logins are disabled.

The Research Scanning Polarimeter: Calibration and ground-based measurements....

Cairns, B., E. E. Russell, and L. D. Travis (1999), The Research Scanning Polarimeter: Calibration and ground-based measurements. In Polarization: Measurement, Analysis, and Remote Sensing II, 18 Jul. 1999, Denver, Col., Proc. SPIE, 3754, 186, doi:10.1117/12.366329.
PDF of Publication: 
Download from publisher's website.