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We describe the X-ray analysis procedure of the on-going ChandraMultiwavelength Plane (ChaMPlane) survey and report the initial results fromthe analysis of 15 selected anti-Galactic center observations (90 deg < l < 270deg). We describe the X-ray analysis procedures for ChaMPlane usingcustom-developed analysis tools appropriate for Galactic sources but also ofgeneral use: optimum photometry in crowded fields using advanced techniques foroverlapping sources, rigorous astrometry and 95% error circles for combiningX-ray images or matching to optical/IR images, and application of quantileanalysis for spectral analysis of faint sources. We apply these techniques to15 anti-Galactic center observations (of 14 distinct fields) in which we havedetected 921 X-ray point sources. We present logN-logS distributions andquantile analysis to show that in the hard band (2 - 8 keV) active galacticnuclei dominate the sources. Complete analysis of all ChaMPlane anti-Galacticcenter fields will be given in a subsequent paper, followed by papers onsources in the Galactic center and Bulge regions.Comment: 13 pages, 5 figures, 8 tables, accepted in ApJ for publicatio

X‐Ray Processing of ChaMPlane Fields: Methods and Initial Results for Selected Anti–Galactic Center Fields