Principal Component (EOF) Analysis

• Purpose
  • Test for potential GEO viewing geometry artifacts

• Method
  • Analyze monthly regional TOA LW and SW Flux fields
    • (360 longitude)x(180 zones)x(36 months)

• Search for GEO artifacts in the first 10 EOF
  • Compare nonGEO with GEO
  • No GEO artifacts can be present in a climate quality dataset

Figure 10b: SW nonGEO and GEO EOF #1 - #5

nonGEO	GEO

Figure 10c: SW nonGEO and GEO EOF #6 - #10

nonGEO	GEO
No SW nonGEO GEO discernable differences in the first 6 EOFs

Figure 10d: LW nonGEO and GEO EOF #1 - #5

nonGEO	GEO

Figure 10e: LW nonGEO and GEO EOF #6 - #10

nonGEO	GEO
No LW nonGEO GEO discernable differences in the first 10 EOFs No SW or LW GEO artifacts observed in the first 10 EOFs