Data model: plDrillPos

General description: This file is a quality assurance file used by the drillers to assure that they have drilled the holes in the correct places. The important information in that respect are the xFlat, yFlat numbers.

Naming convention: plDrillPos-PLATE4.par

Approximate size: 100 kbytes.

File type: Yanny

Read by products: drilling QA software

Written by products: plate

Required header keywords:

• plateId (int32): plate identification number
• raCen (float64): right ascension of plate center, in J2000 degrees
• decCen (float64): declination of plate center, in J2000 degrees
• theta (float32): position angle of the plate (note much of the plate code completely untested for theta not equal zero)

Required column names in DRILLPOS structure:

• holeType (string): type of hole, defined by the enumerated type HOLETYPE; one of "OBJECT", "COHERENT_SKY", "GUIDE", "LIGHT_TRAP", "ALIGNMENT" or "QUALITY"
• objId[5] (int32): SDSS ID numbers for the object, if available (run, rerun, camcol, field id); 0s otherwise
• ra (float64): right ascension of target, J2000 degrees
• dec (float64): declination of target, J2000 degrees
• xFocal (float32): X position of hole in focal plate, in mm
• yFocal (float32): Y position of hole in focal plate, in mm
• xFlat (float32): X position of hole in focal plate when plate is flat, in mm
• yFlat (float32): Y position of hole in focal plate when plate is flat, in mm
• xDrill (float32): X position of hole in 3D
• yDrill (float32): Y position of hole in 3D
• zDrill (float32): Z position of hole in 3D
• holeDiam (float32): diameter of hole to drill (mm)

Notes on case: The keyword and tags names in this file are case-sensitive.

Example file: plDrillPos-3015.par