Enge, P., Akos, D., Do, J., Simoneau, J.B., Pearson, L.W., Seetharam, V., and Oria, A. J. (2004) Measurements of Man-Made Spectrum Noise Floor. Report to NASA Center for AeroSpace Information (CASI): NASA/CR-2004-213551, 20041101; November 2004.
This report consolidates research carried out at Clemson University and Stanford University where a series of measurements were undertaken to identify the man-made radiation present in four bands used by rather different services, namely, L1 Band (1563.42 – 1587.42 MHz), the Unified S-Band (2025 – 2110 MHz), the 2.4 GHz Industrial, Scientific and Medical (ISM) Band (2400 – 2482.50 MHz), and the 23.6-24.0 GHz Passive Sensing Band. Results show that there were distinctive differences in the measurement data in the frequency bands, which should be expected based on the function/regulation associated with each. The GPS L1 Band had little to none terrestrial man-made sources, but the ISM 2.4 GHz Band had a large number of man-made sources regardless of the site and the time. The Unified S Band showed mixed results depending on the sites. The Passive Sensing Band does not contain appreciable man-made radiation.
