% ud_grade [options] [parameter_file]
This facility transforms the resolution of an input HEALPix map. At each step of map resolution upgrade the four output map pixels nested in one pixel of the input map are given the values of the input pixel. At each step of map resolution degradation the four input map pixels nested in one output map pixel are averaged to produce the pixel value in the output map. Caution Beware that, at this stage, the parallel tranport of the polarization (Q and U Stokes vectors) that would be necessary to describe the change in local coordinates is not implemented.
ud_grade runs in interactive mode, self-explanatory.
When `filename' is present, ud_grade enters the non-interactive mode and parses its inputs from the file `filename'. This has the following structure: the first entry is a qualifier which announces to the parser which input immediately follows. If this input is omitted in the input file, the parser assumes the default value. If the equality sign is omitted, then the parser ignores the entry. In this way comments may also be included in the file. In this example, the file contains the following qualifiers:
- (Initial release HEALPix 0.90)
- Extension to multi-dimensional maps (HEALPix 1.20)
|can not allocate memory for array xxx||Fatal||You do not have sufficient system resources to run this facility at the map resolution you required. Try a lower map resolution.|
Version 3.31, 2017-01-06