The part number 1796-SIM1200 appears to be related to the Psyche mission, a NASA mission focused on understanding the redox state of the metal-rich asteroid (16) Psyche. The mission's Oxidation-Reduction Working Group is utilizing a Gamma-Ray and Neutron Spectrometer (GRNS) to detect various elements such as phosphorus, aluminum, calcium, sulfur, magnesium, and oxygen. The GRNS is designed to measure the elemental composition of the asteroid's surface and subsurface, with detection limits varying from \(>1\) wt% for phosphorus to \(\sim5\) wt% for aluminum and calcium, and \(\sim3\) wt% for sulfur. The mission's multispectral imager is also capable of mapping diagnostic silicates on the surface at spatial scales down to \(\sim5\) meters/pixel.
The technical specifications of the GRNS include its ability to detect gamma rays at 1778 keV, which is used to measure the silicon content of the asteroid. This measurement is expected to have higher uncertainty and a coarse spatial resolution of \(\sim5\) pixels over the area of interest. The instrument is designed to be sensitive to concentrations of \(>1\) wt% phosphorus by the end of the primary mission (75+ days of observation). The detection limits of all elements, including phosphorus, can be improved through lower-altitude observations or added observation time, which may be possible in a potential extended mission.
Alarm and error codes for the GRNS are not explicitly mentioned in our research. However, it is likely that the instrument is designed with standard error detection and correction mechanisms, such as those used in other NASA missions, to ensure reliable data collection and transmission.
The user manual for the GRNS is not publicly available. However, it is likely that the manual provides detailed instructions on operating the instrument, including setting up and configuring the instrument, collecting data, and troubleshooting common issues.
Troubleshooting the GRNS would involve identifying and addressing any issues that may arise during data collection or transmission. This could include problems with instrument calibration, data corruption, or communication errors. The troubleshooting process would likely involve checking the instrument's settings, reviewing data logs, and consulting with the mission team or instrument specialists.
The GRNS is programmed to collect data on the elemental composition of the asteroid's surface and subsurface. The programming involves setting the instrument to collect data at specific wavelengths and frequencies, as well as configuring the data transmission protocols. The programming is likely performed by the mission team or instrument specialists using specialized software and tools.
The installation of the GRNS on the Psyche spacecraft involves integrating the instrument into the spacecraft's systems and ensuring that it is properly configured and calibrated. This process would likely involve a series of checks and tests to verify that the instrument is functioning correctly and that the data it collects is accurate and reliable.
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