fundamental-technologies-llc / galileo-issues-repository

Public repository for researchers and collaborators to identify and open issues related to the galileo-epd-summary data product.
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32-sector pitch angles #10

Closed LucasMiller closed 3 years ago

LucasMiller commented 3 years ago

3) 32-sector data. Some previous papers studied Galileo-EPD 16-sector data, others 32-sector data, and others 64-sector data. One great thing enabled by your 'spin Number' variable is that I can easily plot the three datasets simultaneously. To better understand >1 MeV electron 16-sector data, I can use context from lower energy measurements with the 32-sector resolution (E and F channels) and 64-sector resolution (E0, E1). Attached is an example plot near Europa's L-shell (but more than 5 Rj from any moon). The two top left panels give E0 and E1. Black is 16-sector data, blue is 32-sector and orange is 64-sector (don't worry about the lower right panel in orange, it shows DC3 16-sector raw count rates). There seems to be a problem with the 32-sector data (in blue). 16 out of the 32 measured points look good, but 16 others seem to be stacked at the same local pitch angle around 168d. This particular spin is Spin number 13 on day 1997-09-18. I've seen the same 32-sector issue for all the PADs I've analyzed so far. Of course, I may be doing something wrong on my side when reading the csv file. As seen on the attached Figure, the 64-sector data (in orange) look good.

32sectorPitchAngleProblem

LucasMiller commented 3 years ago

image

Resolved.