Hewitt satellite camera
The Hewitt satellite camera was developed by J. Hewitt in England in the 1960s and two copies were built for the purposes of satellite geodesy .
The cameras have Schmidt optics with a field flattener of 24.8 inch aperture (63 cm), an aperture ratio of 1: 1, an image field of 10 ° and are comparable to the better-known Baker-Nunn cameras from the SAO (USA). However, your three-axis mount will not track the satellites in order to avoid errors in motion compensation . It can therefore not observe weak satellites as well, but more precisely than 1 " .
The camera and camera developed at the Royal Radar Establishment in Malvern in southern England was used . a. also in Edinburgh (Scotland) and on Australian satellite stations .
See also: satellite observation
Literature and web link
- Günter Seeber: Satellite Geodesy: Foundation, Methods, and Application , 2nd edition, De Gruyter-Verlag, ISBN 3-11-017549-5 , Berlin 2003
- GPS in Earth Sciences - Optical Global Triangulation; University of Munster 2009
Individual evidence
- ^ J. Hewitt: The 24 in. Schmidt Satellite Cameras, and their use in Geodetic and Geophysical Investigations . In: Philosophical Transactions for the Royal Society of London. Series A, Mathematical and Physical Sciences . tape 262 , Issue 1124, 1967, pp. 26-31 , bibcode : 1967RSPTA.262 ... 26H .
- ^ The 34-inch Hewitt Camera. Retrieved July 23, 2020 .