Summary of Electromagnetic Interference Measurements at Mt. Haleakala Observation Facilities
Abstract
This report documents electromagnetic interference (EMI) measurements made at the Air Force's new Advanced Electro-Optical System (AEOS) and the Space Command Optical facilities located at the summit of Mt. Haleakala, Maui, Hawaii. It also documents EMI measurements made at the University of Hawaii 5 observation facilities also located on Mt. Haleakala. EMI free field measurements were made at various external and internal locations at these facilities to determine the electromagnetic field characteristics created by local television and radio transmitters located nearby. Some limited cable coupling measurements were also made at the AEOS facility. A Tektronix 2716 spectrum analyzer and a EMCO 3104C bicone antenna were used to make the free field measurements. EG&G SCP-1 and SCP-5 clamp on current probes were used to make the cable measurements. External field levels measured within direct line of sight of nearby television transmitting antennas were as high as 5 V/m. Other measurements made inside well shielded areas were in the noise floor of the spectrum analyzer. Measured frequencies ranged from 61 MHz to 450 MHz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1998
- Accession Number
- ADA406808
Entities
People
- Dean I. Lawry
- S. J. Gutierrez
- S. L. Langdon
Organizations
- Air Force Research Laboratory