Analysis of the charging of the SCATHA (P78-2) satellite
Abstract
The charging of a large object in polar Earth orbit was investigated in order to obtain a preliminary indication of the response of the shuttle orbiter to such an environment. Two NASCAP (NASA Charging Analyzer Program) models of SCATHA (Satellite Charging at High Altitudes) were used in simulations of charging events. The properties of the satellite's constituent materials were compiled and representations of the experimentally observed plasma spectra were constructed. Actual charging events, as well as those using test environments, were simulated. Numerical models for the simulation of particle emitters and detectors were used to analyze the operation of these devices onboard SCATHA. The effect of highly charged surface regions on the charging conductivity within a photosheath was used to interpret results from the onboard electric field experiment. Shadowing calculations were carried out for the satellite and a table of effective illuminated areas was compiled.
- Publication:
-
Final Report
- Pub Date:
- December 1980
- Bibcode:
- 1980sss..rept.....S
- Keywords:
-
- Computerized Simulation;
- Electric Field Strength;
- Plasma Sheaths;
- Scatha Satellite;
- Spacecraft Charging;
- Electrical Properties;
- Electrostatic Charge;
- Particle Emission;
- Plasma Spectra;
- Radiation Counters;
- Secondary Emission;
- Space Shuttle Orbiters;
- Spacecraft Models;
- Launch Vehicles and Space Vehicles