[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

*Subject*: [amsat-bb] squint angles and P3D*From*: williamb@xxxxxxxxxxx (William B Magnusson)*Date*: Tue, 24 Aug 1999 20:59:44 +1000

Hi Stacy (et al), Thanks for the replies. >The whole idea of 3-axis stabilization is to keep the antennas pointing at >the sub-satellite point. Thus, the squint angles should always be low and >not worth calculating. Yep ... that's what I'd read. The question was rather from the perspective of a southern hemisphere station where we will probably see the perigee passes where the satellite height will be low compared to apogee. >Also, the antenna/transponder selection will be made such that the field of >illumination by the antenna is appropriate for the satellite distance. That answers my question.... thanks Stacy. > > ArcTan(Subsat.pt.Dist/Satellite Height) = Squint Angle > Thank for the formula. > Remember, though, that P3D will occasionally go into spin mode to dump the >momentum wheel energy, etc. During these times, squint angles can be >calculated just as for AO-13. > Hadn't read that anywhere, thank you .... Regards to all, Bill...vk3jt ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

**Follow-Ups**:**Re: squint angles and P3D***From:*Paul Williamson

**Re: squint angles and P3D***From:*joseph v murray

- Prev by Date:
**Re: Conductive epoxy?** - Next by Date:
**Re: Conductive epoxy?** - Prev by thread:
**FO-29 Digitalker from Sept 10(Fri)** - Next by thread:
**Re: squint angles and P3D** - Index(es):