Omega Hawaii Antenna System: Modification and Validation Tests. Volume 1. Report Proper.

reportActive / Technical Report | Accession Number: ADA082114 | Open PDF

Abstract:

Electronic measurements were performed on the Hawaii Omega Antenna System during the months of May and June 1978 and March and May 1979. The work was performed under NOSC project MP01538B10 with Megatek as contractor. The electrical height of the antenna is 169 metres for all frequencies. The station can easily radiate more than 10 kW on all frequencies. There is no measurable deviation from omnidirectional radiation due to the proximity of the Haiku Valley walls to the south, west and north of the antenna. The apparent capacitance of the antenna was measured. Also, the inductance of the spare variometer and its variation was measured. From these preliminary measurements, the optimum location of the 11.050 kHz helix tap was determined and connected. The value of the antenna systems resistance was measured on three days of different weather conditions and found to vary. This variation is related to the degree of salt deposit on the antenna insulators. A recommended set of gear ratios for the variometer gear boxes is determined. Author

Author(s):
Hanselman, J. C.
Author Organization(s):
MEGATEK CORP SAN DIEGO CA
Descriptive Note:
Final rept.,
Supplementary Note:
See also Volume 2, AD-A082 115.
Pagination:
0043

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NOSC-TR-493-VOL-1
Contract/Grant Number(s):
N00123-78-C-0043
Monitor Series:
TR-493-VOL-1
 Subject Terms
Joint Capability Areas:
JCA_4.7.2_Installation Services; JCA_4.7_Base and Installations Support; JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.5.2_Task; JCA_5.5_Direct; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_1.2.5_Lessons Learned
Modernization Areas:
Microelectronics
Communities of Interest:
Air Platforms
Descriptor(s):
*MONOPOLE ANTENNAS, *OMNIDIRECTIONAL ANTENNAS, *TUNING DEVICES, *ANTENNA COMPONENTS, *OMEGA NAVIGATION, WEATHER, VALIDATION, MODIFICATION, TERRAIN, SALTS, INDUCTANCE, HAWAII, GEARS, VALLEYS, FIELD INTENSITY, CAPACITANCE, HELIXES, TRANSMISSIONS(MECHANICAL), ELECTRICAL INSULATION, TAPS
Field(s)/Group(s):
Electrical and Electronic Equipment
Keyword(s):
Variometers, Electrical taps, Apparent capacitance, Electrical height, LPN NOSC MP01538B10
Report Date:
1979 Oct 19