Merge pull request #217 from wmo-im/FT2023-2-editorial-fixes-for-issu…

…e-197

FT2023-2 editorial fixes for issue #197

GRIB2_CodeFlag_3_13_FlagTable_en.csv

@@ -1,8 +1,8 @@
 Title_en,SubTitle_en,CodeFlag,Value,MeaningParameterDescription_en,Note_en,noteIDs,UnitComments_en,Status
-HEALPix scanning mode,,1,0,"Points scan in +i direction, i.e. from North to South",,,,Operational
-HEALPix scanning mode,,1,1,"Points scan in -i direction, i.e. from South to North",,,,Operational
-HEALPix scanning mode,,2,0,"Points scan in +j direction, i.e. from West to East",,,,Operational
-HEALPix scanning mode,,2,1,"Points scan in -j direction, i.e. from East to West",,,,Operational
-HEALPix scanning mode,,3,0,Adjacent points in i direction are consecutive,,,,Operational
-HEALPix scanning mode,,3,1,Adjacent points in j direction are consecutive,,,,Operational
+HEALPix scanning mode,,1,0,"Points scan in +i (+x) direction",,,,Operational
+HEALPix scanning mode,,1,1,"Points scan in -i (-x) direction",,,,Operational
+HEALPix scanning mode,,2,0,"Points scan in -j (-y) direction",,,,Operational
+HEALPix scanning mode,,2,1,"Points scan in +j (+y) direction",,,,Operational
+HEALPix scanning mode,,3,0,Adjacent points in i (x) direction are consecutive,,,,Operational
+HEALPix scanning mode,,3,1,Adjacent points in j (y) direction are consecutive,,,,Operational
 HEALPix scanning mode,,4-8,,Reserved,,,,Operational

notes/Template_notes.csv

@@ -163,5 +163,5 @@ noteID,note
 163,"Wave periods should be specified in seconds."
 164,"See notes under Code table 4.101 for details."
 165,"'Number of reference period time range' is used to define an outer and, if needed, one or more inner loops. The outer loop gives the overall date and time range of the reference period and the inner loop(s) are used to specify a sub-period over all time instances defined in the outer loop in terms of the time unit defined by 'Reference period indicator of unit for time increment'. Typically the outer loop defines a number of years and inner loop defines the date and time range within each year: for instance 'every January for 30 years'."
-166,"The grid is composed of 12 rhomboids, each rhomboid has nsides**2 grid boxes within a rhomboid."
-167,"Longitude of the first grid point of the first rhomboid given in microdegrees. For instance 45.0 degrees is encoded as 45,000,000."
+166,"The grid is composed of 12 rhomboids, each rhomboid has nsides**2 grid boxes within a rhomboid. When using the nested ordering, nsides must be a power of 2: nsides = 2**k where k=0,1,2,3 ...."
+167,"Longitude of the first grid point of the first rhomboid. The 12 rhomboids are numbered as in the figure 5 of the original paper describing the HEALPix and the longitude of the first point of the first rhomboid corresponds to the diagonal dividing rhomboid 0 and 8 vertically (https://iopscience.iop.org/article/10.1086/427976). The longitude is given in microdegrees. For instance, 45.0 degrees is encoded as 45,000,000."