Low Frequency Ionospheric Sounding System.

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Abstract:

The report describes a low frequency vertical pulsed sounder which makes possible soundings of the ionospheric D-region. The system employs the most recent advancements in solid state analog components and digital arrays. It features a digital intergrating scheme which is accomplished by generation of a median value of signal from 800 pulses or a multiple thereof. By this means, more than 30 dB in available signal to noise ratio is obtained. With selectable sample spacing as small as 1.5 km, both the normal and abnormal components are separately integrated with quadrature sampling in each of 40 height intervals. Other features of the phase coherent sounder include a pseudo-random phase coding for suppression of phase coherent interference and multiple hop echoes. Author

Author(s):
Bibl, Klaus ; Vargas-vila, Richard
Author Organization(s):
LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS
Descriptive Note:
Final rept. 18 Sep 67-31 Jul 70,
Pagination:
0040

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
LTIRF-325/IP, AFCRL-71-0107
Contract/Grant Number(s):
F19628-68-C-0085
Task Number(s):
460302, 53115
Project Number(s):
AF-4603, AF-5631
Monitor Series:
71-0107
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*ATMOSPHERIC SOUNDING, IONOSPHERE), (*DATA PROCESSING, ATMOSPHERIC SOUNDING), LOW FREQUENCY, ANTENNAS, RADIO TRANSMITTERS, RADIO RECEIVERS, INTEGRATED CIRCUITS, DATA STORAGE SYSTEMS, PERFORMANCE(ENGINEERING)
Field(s)/Group(s):
Atmospheric Physics
Keyword(s):
*IONOSONDES, D REGION
Report Date:
1971 Jun 01