Accession Number:

AD0272632

Title:

REPORT OF PHOTOGRAMMETRY OF CLOUDS FROM FIXED CAMERA SITES ON THE GROUND

Descriptive Note:

Corporate Author:

HOWELL (W E) ASSOCIATES INC LEXINGTON MASS

Personal Author(s):

• LOPEZ,MANUEL E.

Report Date:

1961-12-30

Pagination or Media Count:

1.0

Abstract:

A project is under way to relate patterns of cloud form and motion to physical properties of the atmosphere. This report summarizes computing and observing methods used for mapping cloud patterns from stereoscopic pairs of photographs taken from the ground. The observing set-up is described, the geometry of standard photogrammetric analysis is adapted to the purpose at hand, and methods are developed for applying corrections for unknown orientation errors of the cameras based on control points appearing in the photographs. Sources of error are considered, and the difficulty in following a given cloud detail through a sequence of photographs with certainty as to its identity and position, is shown to be the limiting factor in measuring cloud motions. Comments are made on the measurement of wind shear near the clouds by tracer techniques. Author

Descriptors:

• *CLOUDS
• *METEOROLOGY
• *PHOTOGRAPHIC ANALYSIS
• AERIAL CAMERAS
• ATMOSPHERES
• CAMERA MOUNTS
• ERRORS
• MAPPING
• MOTION
• SHEAR STRESSES
• STEREOSCOPES
• SURFACE TO AIR
• WIND

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE