This paper discusses the impact of 30 orbital spacing upon satellite distribution of cable television programming. Included are preliminary results of:
Experiments designed to establish an appropriate protection ratio for cable video transmissions.
Calculations indicating expected levels of interference at 3° spacing.
The conclusions of these exercises indicate that a 3 orbital spacing for C-band domestic satellites will not have a deleterious impact upon program distribution to existing (4.5 meter) cable earth stations. Recommendations are made concerning appropriate protection ratios, use of 3 meter antennas and optimum spacecraft deployment schemes.