| Special Committee 104 Recommendations for Differential GPS Service. |
1986 |
|
| Authors:
R. M. Kalafus; A. J. Van Dierendonck; N. A. Pealer; DEPARTMENT OF TRANSPORTATION WASHINGTON D C
|
 | The Radio Technical Commission for Maritime Service (RTCM) established Special Committee 104 on Differential NAVSTAR/GPS Service in November 1983 to address the methods to be used to provide differential GPS service and to develop standards for the data format. The Special Committee has finished the first phase of its deliberations, which involves data message and format standards, and recommendations for communications bands and a proposed design for pseudolite operation. This ... |
|
| FAA (Federal Aviation Administration) Assessment of Satellite Concepts and Aviation Spectrum Requirements |
FEB 85 |
|
| Authors:
R. F. Bock; A. Buige; V. E. Foose; R. Johnson; R. M. Kalafus; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC ASSOCIATE ADMR FOR DEVELOPMENT AND LOGISTICS
|
| This report documents an FAA effort that identified aeronautical safety related air-ground services that might be provided in the future by satellite services, made estimates of L-band frequency spectrum for these satellites, and developed an approach and conditions for sharing satellite services with other users. Originator supplied keywords include: Satellite concepts; Frequency spectrum; Satellite sharing; Communications; Sharing conditions; Navigation; Surveillance; GPS; L-band. (Author). |
|
| Differential NAVSTAR GPS (Global Positioning System) Design Concept for Harbor/Harbor Entrance Marine Navigation |
MAY 1984 |
|
| Authors:
J. Vilcans; R. M. Kalafus; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA
|
| This report presents a design concept for a high-precision system for harbor/harbor entrance navigation. The concept is based on differential operation of NAVSTAR GPS, whereby local corrections to the satellite signals are broadcast to mariners in a harbor area. The system is expected to provide continuous navigation service with a predictable (absolute) accuracy of 8-12 meters (2drms). The design is configured around a hypothetical system to cover New York Harbor. ... |
|
| Differential Operation of NAVSTAR GPS. |
1983 |
|
| Authors:
R. M. Kalafus; J. Vilcans; n. knable; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA
|
| Under the Selective Availability program the Department of Defense plans to provide the civil community with Standard Positioning Service (SPS), having an accuracy of 500 meters (2drms) when the NAVSTAR GPS becomes operational. Subsequent improvements in accuracy are expected to be instituted as national security considerations permit. However, provisions are also made to degrade accuracy to worse than 500 meters, if necessary. Depending on the type and level of Selective ... |
|
| Microwave Scanning Beam Approach and Landing System Phased Array Antenna. |
MAY 1974 |
|
| Authors:
R. M. Kalafus; G. J. Bishop; F. J. LaRussa; P. J. Pantano; D. Spangler; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS
|
| The design, operating instructions, detailed logic circuitry, and antenna test range results for the electronic circular scanning phased array developed at TSC (DOTSCAN) are described. Components developed for this effort are also described, and test results given. (Author) |
|
| Microwave Scanning Beam Approach and Landing System Phased Array Antenna. Volume I. |
FEB 1973 |
|
| Authors:
R. M. Kalafus; G. J. Bishop; F. J. LaRussa; P. J. Pantano; W. R. Wade; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS
|
| The use of phased arrays for the proposed landing system (MLS) is discussed. Studies relating to ground reflections, near field focusing, and phased-array errors are presented. Two experimental antennas which were fabricated and tested are described. Complete component specifications as well as test results are included. (Author Modified Abstract) |
|
| Microwave Scanning Beam Approach and Landing System Phased Array Antenna. Volume II. |
FEB 1973 |
|
| Authors:
R. M. Kalafus; G. J. Bishop; F. J. LaRussa; P. J. Pantano; W. R. Wade; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS
|
| ;Contents: Evaluation of an R-2R lens as a component in a C-Band phased array; Azimuth component specifications and test results; Elevation component specifications. |
|
| Microwave Scanning Beam Approach and Landing System Phased Array Antenna. |
SEP 1971 |
|
| Authors:
R. M. Kalafus; P. Harris; F. J. LaRussa; G. J. Bishop; P. J. Pantano; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS
|
| The feasibility of the use of phased arrays for the proposed microwave landing guidance system (MLGS) is discussed. The effects of the use of planar and conical beam guidance on the choice of system configurations is investigated. The design of an experimental antenna to demonstrate feasibility is given. (Author) |
|
| DERIVATION OF AEROSPACE ANTENNA COUPLING-FACTOR INTERFERENCE PREDICTION TECHNIQUES. |
APR 1964 |
|
| Authors:
P. J. Khan; W. R. DeHart; R. M. Kalafus; A. I. Simanyi; R. B. Harris; MICHIGAN UNIV ANN ARBOR COOLEY ELECTRONICS LAB
|
| This report describes the resultb of extensive analysis and measurement of antenna coupling factors. The purpose of these studies is to supply information essential to the adequate prediction of the interference between one eletronic communication system and one or more other electronic communication systems. All antennas involved in these studies, with two exceptions, are flush mounted antennas such as would often be utilized on aerospace vehicles of either manned or ... |
|
| DERIVATION OF EROSPACE ANTENNA COUPLING - FACTOR INTERFERENCE PREDICTION TECHNIQUES. |
JAN 1964 |
|
| Authors:
D. K. Adams; W. R. DeHart; R. M. Kalafus; A. I. Simanyi; R. B. Harris; MICHIGAN UNIV ANN ARBOR COOLEY ELECTRONICS LAB
|
| Three Archimedean spirals were tested for antenna patterns and coupling patterns: (1) circular, (2) square, and (3) dielectric-cavity-backed circular. The latter was used in the fundamental mode, with out-of-phase currents at the feed. The square spiral exhibits a broader beam, a better ellipticity ratio, and a larger VSWR over the band, than of the circular spiral. The effect of the dielectric is to broaden the beam, since the antenna radiates ... |
|
Reports by Author
