| Wavenumber Spectrum of Intermediate-Scale Ocean Surface Waves |
10 AUG 2005 |
5 pages |
| Authors:
Paul A. Hwang; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
 | This paper presents an analysis of the wavenumber spectra of intermediate-scale waves (wavelengths between 0.02 and 6 meters) under various sea-state conditions. The main result of the analysis is that the dependence of the dimensionless wave spectrum on the dimensionless wind-friction velocity follows a power-law function. The coefficient and exponent of the power-law function vary systematically with the wavenumber. The wavenumber dependence of the coefficient and exponent serves as an ... |
|
| Space Systems Environmental Interaction Studies |
30 AUG 2001 |
|
| Authors:
M. A. Morgan; Alan C. Huber; David J. Sperry; Alan N. Donkin Jr.; Scott J. Moran; AMPTEK INC BEDFORD MA
|
 | This report describes the objectives and summarizes the outcome, of the work performed under this contract. In addition, and this constitutes the major portion of the report, a comprehensive summary of all the important design elements for the anticipated DIDM-3 instrument is presented herein. As the final effort of the contract, all of the various facets to designing and building a Digital Ion Drift Meter for inclusion in the Communication/Navigation ... |
|
| Space Systems Environmental Interaction Studies |
30 AUG 2000 |
20 pages |
| Authors:
M. A. Morgan; Alan C. Huber; David J. Sperry; Alan N. Donkin Jr.; Scott J. Moran; AMPTEK INC BEDFORD MA
|
| Pre and post launch support work constitute the most significant activity during the report period. DIDM-2 was launched 13 July 2000 on the CHAMP spacecraft. The initial turn-on and early orbit phase of operations was virtually anomalous-event free, and the instrument continues to return good data. A synopsis of the on-orbit performance to date, is presented in this report. A review of another undertaking, the analysis and design work carried ... |
|
| Detection and Characterization of Equatorial Scintillation for Real-Time Operational Support |
18 APR 97 |
22 pages |
| Authors:
W. J. McNeil; A. R. Long; M. J. Kendra; RADEX INC BEDFORD MA
|
| The Phillips Laboratory Scintillation Network Decision Aid (PL- SCINDA) is a software tool which uses real-time data from remote sites to model ionospheric plasma depletions in the equatorial region. The remote instruments continuously measure S4 from geostationary satellite transmissions. Receivers are currently located in Antofagasta, Chile and Ancon Peru. Different combinations of receiver pairs allow: measurements in eastward and westward directions for each site, drift velocity measurements, and measurements along ... |
|
| Optical Diagnostics of Ionospheric Structures and Dynamics |
07 FEB 97 |
114 pages |
| Authors:
Robert H. Eather; Peter Ning; KEO CONSULTANTS BROOKLINE MA
|
| Keo Consultants participated in the research of the Ionospheric Applications Branch at Phillips Laboratory, by implementing improvements in research optical instrumentation (imagers and photometers). This research involved numerous field trips to study aurora, airglow, ionospheric scintillations, barium releases, and heater experiments. Keo customized instrument control software for each application, and developed software to display the resultant images and compared with other data sets. |
|
| Studies of Ionospheric Dynamics Utilizing Data from DMSP |
22 FEB 90 |
|
| Authors:
R. A. Heelis; M. R. Hairston; TEXAS UNIV AT DALLAS RICHARDSON CENTER FOR SPACE SCIENCES
|
| This report covers efforts primarily devoted to the reduction of ion drift meter data from the DMSP satellite. This work has required the development of sophisticated algorithms to generate in-situ ion drift velocity data with respect to the spacecraft and the derivation of an electrostatic potential distribution along the spacecraft track. This initial effort has been directed toward satisfying the needs of mathematical models of the high-latitude convection pattern, with ... |
|
| Studies of Ionospheric Dynamics Utilizing Data from DMSP. Appendix B: complete Listings of the Algorithm to Calculate Potential (DMSPPOTMOD2.FOR) |
22 FEB 90 |
|
| Authors:
R. A. Heelis; M. R. Hairston; TEXAS UNIV AT DALLAS RICHARDSON CENTER FOR SPACE SCIENCES
|
| This report covers the period 1987 to 1989 during which time our efforts have been primarily devoted to the reduction of ion drift meter data from the DMSP satellite. This work has required the development of sophisticated algorithms to generate in-situ ion drift velocity data with respect to the spacecraft and the derivation of an electrostatic potential distribution along the spacecraft track. This initial effort has been directed toward satisfying ... |
|
| Preliminary Data Processing Plan for the Thermal Plasma Experiment on the HILAT Satellite |
31 MAR 1983 |
|
| Authors:
F. J. Rich; R. A. Heelis; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| The thermal plasma experiment is one of five experiments to be flown on the HILAT satellite in a polar orbit. The experiment consists of an ion drift-meter, an ion retarding potential analyzers and a spherical electron Langmuir probe. The details of the instruments are described. The calibrations and conversion factor to change from telemetry units to scientific units are given. Algorithms for converting the raw data into the parameters of ... |
|
| Technical Evaluation of ADS I and II Drifter Performance. |
APR 1978 |
|
| Authors:
G. McNally; E. Reyna; W. J. Merrell Jr.; A. D. Kirwan Jr; TEXAS A AND M UNIV COLLEGE STATION DEPT OF OCEANOGRAPHY
|
| This report evaluates the technical performance of 32 long-term drifters deployed in the Anomaly Dynamics Study special observing periods I and II. A description is given of the Random Access Measurement System on Nimbus 6, the design characteristics of the drifters, and the drogue indicator. We consider the overall technical performance of the system to be excellent. The satellite system has proved to be a highly reliable means of locating ... |
|
| On the Performance and the Error Model of a Single-Degree-of-Freedom Strapdown Gyroscope, |
07 JUL 1970 |
|
| Authors:
Bernhard Stieler; DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V BRUNSWIC K (GERMANY F R)
|
| The performance of strapdown gyros and their drift model for constant and vibrational inputs are discussed. This study as basis for a gyro drift compensation is a synthesis of information from different sources which is completed by simulation test results. |
|
| DOPPLER SPEED AND DRIFT-ANGLE METERS FOR AIRCRAFT. |
22 APR 1966 |
|
| Authors:
G. K. Dudko; G. B. Reznikov; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| In the book are expounded design principles of different Doppler speed and drift-angle meters for aircraft (GSDA) applied in practice, theoretical bases of operation of Doppler meters and peculiarities of construction and operation of separate units of these meters: antennas, UHF channels, Doppler frequency indicators. Furthermore, questions of calibration and adjustment of meters are considered, examples of construction of block diagrams of GSDA are given, and information about complex use ... |
|
| IMAGE VELOCITY SENSOR SUBSYSTEM (IVSS) STUDY. VOLUME III. SUBSYSTEM DEFINITION. |
NOV 1964 |
|
| Authors:
IBM SPACE GUIDANCE CENTER OWEGO NY
|
| This volume presents the results of Tasks 2, 4, 5, and 7 which pertain to the system definition of the IVSS. Section 2 of this volume identifies all function requirements for preparing, conducting and evaluating the experiment. Those functions with a critical impact on the system design received the most attention during this pre-Phase I portion of the study. Section 3 contains all the pertinent analyses and trade-off data used ... |
|
| RECENT DEVELOPMENTS IN THE U. K. IN FLIGHT INSTRUMENTS, |
JUL 1962 |
|
| Authors:
K. R. Honick; ADVISORY GROUP FOR AERONAUTICAL RESEARCH AND DEVELOPMENT PARIS (FRANCE)
|
| Developments in panel mounted (head down) flight instruments are described. The achievement of increased integration of instrument indications together with the use of a flight director indicating demanded action by the pilot by instrumental techniques which separate the functions of sensing, computation and display are discussed. Further simplification of the pilot's task by super-position of essential elements of the instrument field on the external field, using optical projection of collimated ... |
|
| RADAR SET AN/APQ-89; DRIFT ANGLE GROUND SPEED ATTACHMENT (U) |
JAN 1962 |
|
| Authors:
ROBERT N. MCCAFFREY; NAVAL AVIONICS FACILITY INDIANAPOLIS IN
|
|
| RADAR SET AN/APQ-89; DRIFT ANGLE GROUND SPEED ATTACHMENT |
OCT 1961 |
|
| Authors:
ROBERT N. MCCAFFREY; NAVAL AVIONICS FACILITY INDIANAPOLIS IN
|
| Research is reported on the development of a small lightweight attachment to modern attack radar systems which will provide essential navigation information. Conventional Doppler navigators are too large, too heavy, and too expensive for many applications. By utilizing radar equipment already present in an aircraft, the proposed attachment can be made small, light inexpensive, and easy to maintain. Research has 2 main objectives: (1) to modify the design of the ... |
|
| DRIFT ANGLE AND GROUND SPEED MEASURING EQUIPMENT |
APR 1961 |
|
| Authors:
ROBERT N. MCCAFFREY; NAVAL AVIONICS FACILITY INDIANAPOLIS IN
|
| Research is concerned with the development of a small light-weight attachment to modern attack radar systems which will provide essential navigation information. This project has two main objectives. One is to modify the design of the present drift angle attachment as necessary for use at K-band, and to adapt it for use with radar set AN/APQ-89(XAN-1). The other objective is to develop a technique for extracting ground speed information from ... |
|
| MEASUREMENT OF THE LATERAL SET OF A SUBMARINE BY TIME INTEGRATION OF THE RUDDER ANGLE USED IN STEERING A STRAIGHT COURSE |
11 MAY 1957 |
|
| Authors:
William S. von Arx; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
|
| A SIMPLE ELECTRICAL ANALOG FOR THE SOLUTION OF THE EKMAN WIND DRIFT PROBLEM WITH THE COEFFICIENT OF EDDY VISCOSITY VARYING ARBITRARILY WITH DEPTH |
SEP 1955 |
|
| Authors:
K.G. WILSON; A.B. ARONS; Henry Stommel; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
|
Reports by Keyword(s)
DRIFTMETERS
