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Validation of nascap-2k spacecraft-environment interactions calculations
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gardner, B. M. Cooke, D. L. Davis, V. A. Mandell, M. J. Mikellides, I. G. Neergaard, L. F. Minor, J. |
| Copyright Year | 2004 |
| Description | The recently released Nascap-2k, version 2.0, three-dimensional computer code models interactions between spacecraft surfaces and low-earth-orbit, geosynchronous, auroral, and interplanetary plasma environments. It replaces the earlier three-dimensional spacecraft interactions codes NASCAP/GEO, NASCAP/LEO, POLAR, and DynaPAC. Nascap-2k has improved numeric techniques, a modern user interface, and a simple, interactive satellite surface definition module (Object ToolKit). We establish the accuracy of Nascap-2k both by comparing computed currents and potentials with analytic results and by comparing Nascap-2k results with published calculations using the earlier codes. Nascap-2k predicts Langmuir-Blodgett or Parker-Murphy current collection for a nearly spherical (100 surfaces) satellite in a short Debye length plasma depending on the absence or presence of a magnetic field. A low fidelity (in geometry and time) Nascap-2k geosynchronous charging calculation gives the same results as the corresponding low fidelity NASCAP/GEO calculation. A high fidelity calculation (using the Nascap-2k improved geometry and time stepping capabilities) gives higher potentials, which are more consistent with typical observations. Nascap-2k predicts the same current as a function of applied potential as was observed and calculated by NASCAP/LEO for the SPEAR I rocket with a bipolar sheath. A Nascap-2k DMSP charging calculation gives results similar to those obtained using POLAR and consistent with observation. |
| File Size | 838314 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040111077 |
| Archival Resource Key | ark:/13960/t1vf1sk6q |
| Language | English |
| Publisher Date | 2004-03-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Programming And Software Electric Potential Spacecraft Charging Auroras Computerized Simulation Space Environment Simulation Geosynchronous Orbits Electric Current Space Plasmas Computer Programs Program Verification Computers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
