Josef W. Segur <jsegur@frontiernet.net> wrote:

"Max Power" <mikehack@u.washington.edu> wrote:

High Angle Range WU, what is the highest acceptable design value (PR - 
telescope)?

<URL: http://www.naic.edu/~astro/general_info/basic.shtml > gives some
information from which this can be estimated:

 Declination range     -01:24:00 through +38:00:00	
 Azimuth Slew Rate     0.4 deg/s, 1440 deg/hour	
 Elevation Slew Rate  0.04 deg/s, 144.0 deg/hour	
 Zenith angle range   1.06 - 19.69 degrees

Azimuth can slew 42.8 degress in the 107 second duration of a S@H
classic WU. Starting at 201.4 deg. az. and ending at 244.8 deg. is
one possibility. If the elevation were fully depressed, the
declination for those points would be close to zero, and I estimate
the motion at about 28.7 degrees of angle range. The Earth's rotation
in those 107 seconds adds 0.45 degrees, so I'd say 29 degrees is
a reasonable figure for the largest possible angle range.

Oops, I tried to work too much of that in my head and sent it without
double checking. I revise my estimate of the angle range due to feed
motion to half the above, giving 15 degrees as a reasonable max angle
range.

-- 
                                                   Joe