Polar Azimuth Diversity HF Propagation Experiment

• Main Authors: Baker,Kurt A, Haines,D M, Weijers,Bertus
• Other Authors: ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
• Format: Text
• Language: English
• Published: 1986
• Subjects: Radiofrequency Wave Propagation; Radio Communications; *COMMUNICATIONS NETWORKS; *ADAPTIVE SYSTEMS; *RADIO TRANSMITTERS; *IONOSPHERIC PROPAGATION; *RADIO RECEPTION; HIGH FREQUENCY; MILITARY FACILITIES; EXPERIMENTAL DATA; FREQUENCY MODULATION; SIGNAL TO NOISE RATIO; CONTINUOUS WAVES; ALASKA; NEW YORK; RADIO RECEIVERS; TIME DOMAIN; GREENLAND; NORTH DAKOTA; Polar diversity; Grand forms; AZ Mutal diversity; AVA; Chirpsounders; Thule air base; Barter Island; Frequency domain; Spatial domain; WURADC46001609; PE62702F; Grand Forks; Greenland; Thule Air Base; Thule Air; Thule; Alaska
• Online Access: http://www.dtic.mil/docs/citations/ADA174157; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA174157

The report presents the results of an HF Azimuth Diversity Propagation Experiment conducted by RADC over several paths, transauroral and polar, separated in azimuth by 30, 70, and 100 degrees, as part of the RADC Adaptive HF Propagation Program. The data presented give the occurrence of several ionospheric characteristics important to the operation of HF networks in a disturbed environment. The analysis was performed on data collected furing the four seasonal periods to obtain statistical samples representive of each season under slightly disturbed as well as quiet conditions. The system used to collect the data was a network of three chirpsounder transmitters and one receiver, each sweeping over a frequency range of 2-30 MHz, once every five minutes. The transmitters were located at Ava, N.Y., Grand Forks, N. Dak., and Barter Island, Alaska. The receiving system was located at Thule Air Base, Greenland.