| averageDecFromCat(cat) | Compute the average declination from a catalog of measurements. | 
| averageRaDec(ra, dec) | Calculate average RA, Dec from input lists using spherical geometry. | 
| averageRaDecFromCat(cat) | Calculate the average right ascension and declination from a catalog. | 
| averageRaFromCat(cat) | Compute the average right ascension from a catalog of measurements. | 
| constructDataIds(filters, visits, ccds[, …]) | Returns a list of dataIds consisting of every combination of visit & ccd for each filter. | 
| constructRunList(filter, visits, ccds[, …]) | Construct a comprehensive runList for processCcd.py. | 
| discoverDataIds(repo, **kwargs) | Retrieve a list of all dataIds in a repo. | 
| ellipticity(i_xx, i_xy, i_yy) | Calculate ellipticity from second moments. | 
| ellipticity_from_cat(cat[, slot_shape]) | Calculate the ellipticity of the Shapes in a catalog from the 2nd moments. | 
| ellipticity_from_shape(shape) | Calculate the ellipticty of shape from its moments. | 
| getCcdKeyName(dataid) | Return the key in a dataId that’s referring to the CCD or moral equivalent. | 
| loadDataIdsAndParameters(configFile) | Load data IDs, magnitude range, and expected metrics from a yaml file. | 
| loadParameters(configFile) | Load configuration parameters from a yaml file. | 
| loadRunList(configFile) | Load run list from a YAML file. | 
| medianEllipticity1ResidualsFromCat(cat) | Compute the median real ellipticty residuals from a catalog of measurements. | 
| medianEllipticity2ResidualsFromCat(cat) | Compute the median imaginary ellipticty residuals from a catalog of measurements. | 
| medianEllipticityResidualsFromCat(cat) | Compute the median ellipticty residuals from a catalog of measurements. | 
| positionRms(ra_avg, dec_avg, ra, dec) | Calculate the RMS between RA_avg, Dec_avg and RA, Dec | 
| positionRmsFromCat(cat) | Calculate the RMS for RA, Dec for a set of observations an object. | 
| raftSensorToInt(vId) | Construct an int that encodes raft, sensor coordinates. | 
| repoNameToPrefix(repo) | Generate a base prefix for plots based on the repo name. | 
| sphDist(ra1, dec1, ra2, dec2) | Calculate distance on the surface of a unit sphere. |