Track curve filesΒΆ
Track lists (dependency of frame shift on observation time) are usually used for determining the value of periodic error of the telescope mount. A track curve table consists of observation time in Julian date form followed by shifts in the horizontal (X) and the vertical (Y) axes in pixels relative to the reference frame.
Output files are stored in the ASCII format; the end of the line is represented by
CR+LF
in the DOS/MS Windows environment and by LF
in the Unix/Linux
environment. First line contains a list of column names separated by single space
character. Second line consists of additional information and has no special
formatting, it must not start by number, though.
On the following lines, the table values are stored. The values are separated by tab character or single space, rows are separated by the end-of-line character (see above). Parsers must ignore all additional white characters. Empty lines indicates, that the corresponding frame was not successfully processed and thus shift values could not be determined. See table 1 for short description of columns.
Table 1
Keyword | Description |
---|---|
JD | Geocentric Julian date of observation |
OFFSETX | Relative shift in horizontal direction |
OFFSETY | Relative shift in vertical direction |