HOP 59 - Quiet Sun Evolution - A Hinode Heritage Study


The plan for this HOP was to track the quiet Sun continuously near disk center for three days. EIS would take 50% of the data recorder allocation rather than the usual 23% in order to allow a large field-of-view and a wide wavelength selection.

HOP 59 description

22-25 January 2008

This was scheduled during the period Hinode was having problems with the X-band antenna (which eventually failed). This meant the satellite data rate was lower than originally expected.

Due to the lower data rate the original HOP 59 study was swapped for the study cam_qs_2as_context, which covered the area 120" x 360" with the 2" slit in 33 minutes. Rather than run continuously, the study was scheduled at approximately 50 minute intervals from 11:12 UT on 22 January to the final raster beginning 09:06 UT on 25 January.

Of the 81 total rasters, eight were lost due to telemetry problems. The longest gaps were from 22:13 (23rd) to 00:10 (24th), 09:03 to 13:15 (24th), and 15:20 to 17:05 (24th).

I fit single Gaussians to Fe XII 195 and He II 256, and I show below the movies derived from the fit parameters.


Left panel shows the Fe XII 195 intensity (linear scale); the middle panel shows line-of-sight velocity (scaled between -20 and +20 km/s); and the right panel shows line width (scaled between 50 and 150 milli-Angstroms).

Left panel shows the He II 256 intensity (linear scale); the middle panel shows line-of-sight velocity (scaled between -25 and +25 km/s); and the right panel shows line width (scaled between 50 and 150 milli-Angstroms).



Page maintained by Dr Peter R Young.