• ME720se15w1332CoverChart

This is how to interpret the plots in: http://jsoc.stanford.edu/doc/data/hmi/coverage_maps/e15w1332/ and http://jsoc.stanford.edu/doc/data/hmi/coverage_maps/fd10/

LEFT PLOT :

1. GOLD spaces indicate times when the iss loop is open, an indicator that the instrument was not in normal data taking mode.
2. BLUE spaces indicate times when data records have been processed but there is no useful observation for this time.
3. PINK spaces indicate times when data records are absent, not observed or not yet processed.
4. GREEN spaces indicate times when QUALITY is anything but 0x00000000
5. WHITE spaces indicate times where data is ready for use. The colors on the coverage map indicate times where the data product is not available or has some QUALITY bits set. Colors mean:

RIGHT PLOT :

1. COLORED spaces indicate times when inverted data is present; the color of the data correspond to the value of INVNPROC/max(TOTVALS), or (the number of inverted pixels)/max(total number of pixels within the solar radius). The maximum value of TOTVALS is taken because the deviation in this quantity is small.
2. WHITE spaces indicate times where the stokes data are available but the inversion module has not yet been run.

Note for the LEFT plot : GOLD is overplotted on BLUE; as a result, times when data is missing may be hidden underneath times when the iss loop is open.

Note for the LEFT plot: GREEN areas are nearly always fine; for instance, the daily stripes at 0600 and 1800 hours are times when daily calibrations are made (low line-of-sight velocity at SDO noon and midnight) and a pair dark and cal-mode filtergrams are made on each camera. This means that 2 of the normal 12 Doppler camera and 2 of the normal 36 Vector camera filtergrams are absent. Since several time steps on each side of the target time are used for interpolation this means that 2 of 72 filtergrams will be missing for 6 of the 45s time steps for the LOS products causing the vertical green bars on the coverage maps. Since the 12-min products also use data from a larger window for averaging, the green bars are wider for the 720s products. Data at these times have negligibly larger errors.

Note for BOTH plots : The plots were made on the time indicated on the lower left-hand corner. Data quality and availability are subject to change.

Thank you, M.B.!