Comparison of observed and modeled isoplanatic angles using synoptic weather data

John R. Roadcap; Carolyn D. Morgenstern

doi:10.1117/12.207005

17 April 1995 Comparison of observed and modeled isoplanatic angles using synoptic weather data

John R. Roadcap, Carolyn D. Morgenstern

Proceedings Volume 2375, Beam Control, Diagnostics, Standards, and Propagation; (1995) https://doi.org/10.1117/12.207005
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

A comparison of observed and modeled isoplanatic angles using synoptic meteorological data is performed over an annual cycle during 1993 - 1994. Time series of isoplanatic angles were observed during 58 night-time episodes at the Phillips Laboratory (PL) Starfire Optical Range. Isoplanatic angles were also computed for corresponding times by integration of modeled Cn² vertical profiles derived from the Dewan and Hufnagel models. Both models used adjacent Albuquerque rawinsonde data for model input. Results show significantly smaller model error associated with the Dewan isoplanatic angles than associated with the Hufnagel isoplanatic angles. The Dewan model is also sensitive to tropopause height which is used as part of its scale length determination. Synoptic weather comparisons are accomplished for the winter period of December 1993 - February 1994. The comparisons tend to support the correlation of low isoplanatic angle with disturbed and higher isoplanatic angle with undisturbed synoptic weather patterns, respectively.

Citation Download Citation

John R. Roadcap and Carolyn D. Morgenstern "Comparison of observed and modeled isoplanatic angles using synoptic weather data", Proc. SPIE 2375, Beam Control, Diagnostics, Standards, and Propagation, (17 April 1995); https://doi.org/10.1117/12.207005

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