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Preliminary calibration plan for the advanced particles and field observatory (apafo) magnetometer experiment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Voorhies, C. V. Langel, R. A. Slavin, J. Lancaster, E. R. Jones, S. |
| Copyright Year | 1991 |
| Description | Prelaunch and postlaunch calibration plans for the APAFO magnetometer experiment are presented. A study of tradeoffs between boom length and spacecraft field is described; the results are summarized. The prelaunch plan includes: calibration of the Vector Fluxgate Magnetometer (VFM), Star Sensors, and Scalar Helium Magnetometer (SHM); optical bench integration; and acquisition of basic spacecraft field data. Postlaunch calibration has two phases. In phase one, SHM data are used to calibrate the VFM, total vector magnetic field data are used to calibrate a physical model of the spacecraft field, and both calibrations are refined by iteration. In phase two, corrected vector data are transformed into geocentric coordinates, previously undetected spacecraft fields are isolated, and initial geomagnetic field models are computed. Provided the SHM is accurate to the required 1.0 nT and can be used to calibrate the VFM to the required 3.0- nT accuracy, the tradeoff study indicates that a 12 m boom and a spacecraft field model uncertainty of 5 percent together allow the 1.0 nT spacecraft field error requirement to be met. |
| File Size | 2643945 |
| Page Count | 88 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910020886 |
| Archival Resource Key | ark:/13960/t6m09194t |
| Language | English |
| Publisher Date | 1991-07-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Instrumentation Geomagnetism Observatories Magnetometers Calibrating Scalars Iteration Spacecraft Models Magnetic Fields Helium Geocentric Coordinates Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
