Right Bjoern As I see it I need to concentrate on the area around the anti sun point. So look east in the evening and west in the morning. But whatis the 'Clerke Belt" and how do I find the dec for 21 N? Ulhas Deshpande Nagpur, Central India 21 08 30 N,79 03 08 E Alt 247 m ----- Original Message ----- From: "Björn Gimle" <b_gimle@algonet.se> To: "Ulhas Deshpande" <ulhas@nagpur.dot.net.in>; "Matson, Robert" <ROBERT.D.MATSON@saic.com>; "Seesat-L" <SeeSat-L@satobs.org> Sent: Wednesday, 06 March, 2002 11:54 Subject: Re: Sunangle and skymap > > > GMT). I set up my 16 x 70 binos and looked for any flashes in the region > but > > found none in about half hours search. Are none of these sats flashing for > > India? How does one know when flashes occur? Is there any preffered sun > > angle? > > > The geometry that causes this phenomenon is based on the following > assumptions: > 1. The satellite is geostationary, i.e. in circular orbit with MM=1.0027 and > i=0 > 2. It is operationally stabilized to point its solar panel normals near the > Sun. > 3. The panel normals are fixed at declination 0, but follow the Sun in R.A. > This means that if the Sun's declination is "near" the declination of the > Clarke belt (-8 from 60N) the satellites often flare near the R.A. of 12h + > Sun's R.A. > > You don't really have to know which satellites to look at - just find the > most likely place, and keep watching it as the rotating Earth shifts it > (about 2.5 degrees/h in R.A., 18 degrees/h or more in R.A. > > > Use SkyMap (Rob Matson) to find where to look. > See instructions and an example with screenshot and .cfg file at > http://www.algonet.se/~b_gimle/geoflare.htm > > -- bjorn.gimle@tietotech.se (office) -- > -- b_gimle@algonet.se (home) http://www.algonet.se/~b_gimle -- > -- COSPAR 5919, MALMA, 59.2576 N, 18.6172 E, 23 m -- > -- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m -- > > > > > ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
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