| Calculations of Self-Broadened Line Widths and Database Maintenance for HITRAN |
AUG 97 |
136 pages |
| Authors:
Robert R. Gamache; MASSACHUSETTS UNIV LOWELL DEPT OF ENVIRONMENTAL EARTH AND ATMOSPHERIC SCIENCES
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 | Total internal partition functions were calculated and polynomial coefficients determined for all species present on the 1992 HITRAN database and for some of the additional species on the 1996 HITRAN database. All spectroscopic parameters for the oxygen molecule have been recalculated and files created for HITRAN96. Halfwidths and line shifts for a number of bands of water vapor have been calculated using the Complex Robert-Bonamy Formalism (CRBF) method developed at ... |
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| Calculations and Databasing of Molecular Absorption Parameters for HITRAN |
25 AUG 91 |
76 pages |
| Authors:
Robert R. Gamache; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| Total internal partition sums of the species on the HITRAN database are presented. The development of maintenance programs and update programs for the 1991 version of the HITRAN database is given as well as the construction of the 1991 version; new data and developments are presented. The creation of new maintenance programs for updating halfwidths of O sub 3 and H sub 2 O is discussed. Calculations are shown for ... |
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| Ionospheric Characteristics for Archiving at the World Data Centers |
DEC 90 |
52 pages |
| Authors:
Robert R. Gamache; Bodo W. Reinisch; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| A database structure for archiving ionospheric characteristics at uneven data rates was developed at the July 1989 Ionospheric Informatics Working Group (IIWG) Lowell Workshop in Digital Ionogram Data Formats for World Data Center Archiving. This structure is proposed as a new URSI standard and is being employed by the World Data Center A for solar terrestrial physics for archiving characteristics. Here the database has been slightly refined for the application ... |
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| ARTIST Tape Output Formats |
JUL 90 |
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| Authors:
Jane Tang; Claude G. Dozois; Robert R. Gamache; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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 | The format of the ARTIST data and raw data records written to magnetic tape are described. The contents of each record type are fully explained making possible an unpacking of the data for subsequent analysis. A new generation of modern ionosondes is now being deployed world wide. These are the University of Lowell Center for Atmospheric Research (ULCAR) Digisonde 256 and AN/FMQ-12 DISS systems. The Digisonde 256 network will provide ... |
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| A Comparison of Manual Scaled and Predicted foE and foF1 Critical Frequencies |
JUL 90 |
55 pages |
| Authors:
Robert R. Gamache; William T. Kersey; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| The CCIR and Titheridge foE critical frequency prediction routines were tested by comparison with 1875 manually scaled values. The foF1 critical frequency prediction routine of Millman et al was tested by comparison with 1005 manually scaled values. Plots and statistics of the comparisons are presented and discussed. From the results recommendations are made to help improve autoscaling. |
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| Progress on Artist Improvements |
NOV 88 |
30 pages |
| Authors:
Jane Tang; Robert R. Gamache; Bodo W. Reinisch; NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA
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| Digisonde ionograms are automatically scaled in ARTIST (Automatic Real Time Ionogram Scaler with True Height). The presence of multiple Es traces had caused errors in the autoscaling. New software has been developed that allows to properly track the F trace by identifying the multiple Es echoes before the F trace identification is initiated. Multiple F traces are also identified in order to more securely identify the IF trace in the ... |
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| Calculation of Molecular Absorption Parameters and Updating the AFGL atmospheric Line Parameter Compilation |
15 SEP 88 |
177 pages |
| Authors:
Robert R. Gamache; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| The changes and updates made that produced the 1986 version of the HITRAN database are discussed. The new format adopted and the programs and files that are distributed with the database are reviewed. We present the new parameters added to the database and the sources of the data. We briefly discuss our work on the temperature dependence of the N2-broadened halfwidths and line shifts for ozone and water vapor. The ... |
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| Electron Density Profiles and Plasma Drift Measurements with Digital Ionosondes |
SEP 88 |
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| Authors:
Bodo W. Reinisch; Jurgen Buchau; Robert R. Gamache; Klaus Bibl; Gary S. Sales; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| Knowledge of the three dimensional electron density distribution and the plasma drift in the earth's ionosphere is needed for the radio communication engineer and the geophysicist. The combination of global models, e.g. the International Reference Ionosphere (IRI), modern digital ionosondes, and relatively powerful micro-computers provide the capabilities to overcome the limitations that have heretofore prevented real time ionospheric specification and improved forecasting techniques. The developing network of digital ionosondes provides ... |
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| Status of Artist Upgrade |
SEP 88 |
50 pages |
| Authors:
Jane Tang; Robert R. Gamache; Eric Li; David F. Kitrosser; Bodo W. Reinisch; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| Digisonde 256s and the AWS version DISS (Digital Ionospheric Sounding System) were installed in Argentia, Newfoundland; Wallops Island, Virginia in 1986; Bermuda in 1987; College, Alaska and Goose Bay, Labrador in 1988. The systems generally have run successfully at these stations. Ionospheric data, tape and hard copy records and system status reports are available from these mid and high latitude stations. It was realized that additional developments would improve the ... |
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| High Latitude Ionospheric Radio Studies |
JAN 88 |
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| Authors:
Bodo W. Reinisch; Klaus Bibl; Claude G. Dozois; Robert R. Gamache; David F. Kitrosser; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| Structure and dynamics of the ionosphere are explored under this contract by digital high-frequency sounding techniques. The research emphasizes the investigation of the auroral and subauroral ionosphere, but also includes studies on the polar cap and mid-latitude ionosphere. Keywords: Drift, Main F- Layer trough. |
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| Theoretical N2-, 02-, and Air-Broadened Halfwidths of Ozone Calculated by Quantum Fourier Transform Theory with Realistic Collision Dynamics |
31 DEC 85 |
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| Authors:
Robert R. Gamache; Richard W. Davies; Laurence S. Rothman; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| Collision broadened halfwidths of ozone are evaluated with nitrogen, oxygen, and air as the perturbing gases. It is important to consider more realistic collision dynamics in the calculations. By replacing the classical path trajectories by linear trajectories with constant velocities chosen to give the equations of motion exact to first order in time we develop the interruption function in terms of the actual distance of closest approach determined by the ... |
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| Microwave and Infrared Absorption Properties of Atmospheric Species with Special Emphasis on Line Widths and Shifts |
JUL 85 |
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| Authors:
Robert R. Gamache; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| In this report the work performed on updating the HITRAN data base and hot gas atlas is described and the list of data given. Our work on the development of the QFT-ID theory for collision broadened halfwidths of asymmetric rotors, i.e. 03 and H20, is described. A review of second order perturbation schemes to calculate the line shift and width is given with application to H20. The temperature dependence of ... |
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| Electron Density Profiles from Automatically Scaled Digital Ionograms. The Artist's Valley Solution |
JUL 85 |
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| Authors:
Robert R. Gamache; William T. Kersey; Bodo W. Reinisch; LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH
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| Electron density 'true height' profiles are calculated from automatically scaled Digisonde ionograms. The profile algorithm uses the modified polynomial fitting method separately for the E and the F region profile calculations. A new approach to considering the transition region between the E and F layers allows to determine the F profile with good accuracy from the ordinary echo trace. The total electron content between the peak of the E layer ... |
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| Automatic Scaling of Digisonde Ionograms Computer Program and Numerical Analysis Documentation |
FEB 1983 |
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| Authors:
Robert R. Gamache; Bodo W. Reinisch; Jane Tang; LOWELL UNIV RESEARCH FOUNDATION MA
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| Automatic scaling of Digisonde ionograms by the ARTIST system is discussed and reference is made to the ARTIST's success in scaling over 8000 ionograms. Some of the numerical methods implemented by the ARTIST system are described in detail and the logic of the ARTIST software is explained. The input necessary to and the output of the ARTIST system are also discussed. |
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| Automatic Scaling of Digisonde Ionograms Test and Evaluation Report |
SEP 1982 |
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| Authors:
Bodo W. Reinisch; Jane S. Tang; Robert R. Gamache; LOWELL UNIV RESEARCH FOUNDATION MA
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| Ionograms contain as basic information the virtual range versus frequency. The Digisonde 128PS also measures amplitude, phase, polarization, incidence angle and the spectral signature of the echoes. This allows automatic scaling of the ionograms and conversion to vertical electron density profiles. This report discusses the automatic scaling of some 8000 Digisonde ionograms from the Goose Bay Ionospheric Observatory (64.6N geomagnetic) of the Air Force Geophysics Laboratory. These ionograms display a ... |
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| Measuring the Antenna Pattern of the HF Heater Antenna in Puerto Rico |
MAR 1982 |
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| Authors:
Bodo W. Reinisch; Robert W. Gowell; James Moore; Jackie B. Waaramaa; Robert R. Gamache; LOWELL UNIV RESEARCH FOUNDATION MA
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| The radiation pattern of the 4 x 8 element array of the Arecibo HF heater antenna was measured with a Digisonde onboard AFGL's KC 135 airplane. With seven flight tracks over the antenna array at an altitude of 8840 m it was verified that the radiation pattern of the heater antenna is in good agreement with the calculations. The measurements were conducted at 5.1 MHz. (Author) |
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Reports by Author
