docu update

src/operator_help.h

@@ -417,19 +417,19 @@ static char *SelectHelp[] = {
     "            Deletes all fields with parameters in a user given list.",
     "",
     "PARAMETER",
-    "    name              STRING  Comma separated list of variable names",
-    "    param             STRING  Comma separated list of parameter identifiers",
-    "    code              INTEGER Comma separated list of code numbers",
-    "    ltype             INTEGER Comma separated list of GRIB level types",
-    "    levidx            INTEGER Comma separated list of index of levels",
-    "    level             FLOAT   Comma separated list of vertical levels",
-    "    minute            INTEGER Comma separated list of minutes",
-    "    hour              INTEGER Comma separated list of hours",
-    "    day               INTEGER Comma separated list of days",
-    "    month             INTEGER Comma separated list of months",
-    "    year              INTEGER Comma separated list of years",
-    "    timestep          INTEGER Comma separated list of timesteps",
-    "    timestep_of_year  INTEGER Comma separated list of timesteps of year",
+    "    name              STRING  Comma separated list of variable names.",
+    "    param             STRING  Comma separated list of parameter identifiers.",
+    "    code              INTEGER Comma separated list of code numbers.",
+    "    ltype             INTEGER Comma separated list of GRIB level types.",
+    "    levidx            INTEGER Comma separated list of index of levels.",
+    "    level             FLOAT   Comma separated list of vertical levels.",
+    "    minute            INTEGER Comma separated list of minutes.",
+    "    hour              INTEGER Comma separated list of hours.",
+    "    day               INTEGER Comma separated list of days.",
+    "    month             INTEGER Comma separated list of months.",
+    "    year              INTEGER Comma separated list of years.",
+    "    timestep          INTEGER Comma separated list of timesteps. Negative values selects timesteps from the end (netCDF only).",
+    "    timestep_of_year  INTEGER Comma separated list of timesteps of year.",
     NULL
 };
 
@@ -539,17 +539,17 @@ static char *SeltimeHelp[] = {
     "                 Selects a month and optional an arbitrary number of timesteps before and after this month.",
     "",
     "PARAMETER",
-    "    timesteps  INTEGER  Comma separated list of timesteps",
-    "    times      STRING   Comma separated list of times (format hh:mm:ss)",
-    "    hours      INTEGER  Comma separated list of hours",
-    "    days       INTEGER  Comma separated list of days",
-    "    months     INTEGER  Comma separated list of months",
-    "    years      INTEGER  Comma separated list of years",
-    "    seasons    STRING   Comma separated list of seasons (DJF, MAM, JJA, SON)",
-    "    date1      STRING   Start date (format YYYY-MM-DDThh:mm:ss)",
-    "    date2      STRING   End date (format YYYY-MM-DDThh:mm:ss) [default: date1]",
-    "    nts1       INTEGER  Number of timesteps before the selected month [default: 0]",
-    "    nts2       INTEGER  Number of timesteps after the selected month [default: nts1]",
+    "    timesteps  INTEGER  Comma separated list of timesteps. Negative values selects timesteps from the end (netCDF only).",
+    "    times      STRING   Comma separated list of times (format hh:mm:ss).",
+    "    hours      INTEGER  Comma separated list of hours.",
+    "    days       INTEGER  Comma separated list of days.",
+    "    months     INTEGER  Comma separated list of months.",
+    "    years      INTEGER  Comma separated list of years.",
+    "    seasons    STRING   Comma separated list of seasons (DJF, MAM, JJA, SON).",
+    "    date1      STRING   Start date (format YYYY-MM-DDThh:mm:ss).",
+    "    date2      STRING   End date (format YYYY-MM-DDThh:mm:ss) [default: date1].",
+    "    nts1       INTEGER  Number of timesteps before the selected month [default: 0].",
+    "    nts2       INTEGER  Number of timesteps after the selected month [default: nts1].",
     NULL
 };
 
@@ -4079,7 +4079,7 @@ static char *DeriveparHelp[] = {
     "",
     "DESCRIPTION",
     "    This operator computes the sea level pressure (air_pressure_at_sea_level). Required input fields",
-    "    are surface_air_pressure and air_temperature on hybrid sigma pressure levels.",
+    "    are surface_air_pressure, surface_geopotential and air_temperature on hybrid sigma pressure levels.",
     "",
     "NOTE",
     "    The netCDF CF convention for vertical hybrid coordinates is not supported, yet!",