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Design of a single‐axis platform for balloon‐borne remote sensing

 

作者: L. M. Coyle,   G. Aurilio,   G. U. Nystrom,   J. Bortz,   B. G. Nagy,   K. V. Chance,   W. A. Traub,  

 

期刊: Review of Scientific Instruments  (AIP Available online 1986)
卷期: Volume 57, issue 10  

页码: 2512-2518

 

ISSN:0034-6748

 

年代: 1986

 

DOI:10.1063/1.1139101

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We describe the design of two telescope pointing systems for remote optical sensing of the stratosphere from a balloon‐borne gondola. The telescope pointing accuracy is ±0.02° in elevation, from a gondola which has static and dynamic tilts up to ±3°. Each system consists of a telescope, an elevation control subsystem, and a pitch‐stabilized single‐axis reference platform. The Mark I unit has performed successfully on each of its two balloon flights, for a total of over 16 h in the stratosphere; the Mark II unit is currently under construction. The single‐axis platform is referenced to a rate‐integrating gyroscope and an inclinometer for high‐ and low‐frequency pitch‐angle variations, respectively. The Mark I platform is supported by ball bearings, driven by a brush‐contact torque motor, and is subject to a small, permanent pitch angle error which depends directly on the gyro drift rate. The Mark II platform uses flex‐pivot supports, a brushless motor, and for even a relatively large gyro drift rate, is designed to asymptotically approach zero angular offset error.

 

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