Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2011 12 20.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2011   18:22:30   ( -68.61,  82.75) ( -68.56,  82.91)    8.80                71
 12/20/2011   19:13:13   (  68.41,-109.69) (  68.40,-109.64)    2.58                 4
 12/20/2011   20:03:53   ( -68.24,  57.84) ( -68.23,  57.80)    2.42                73
 12/23/2011   10:39:18   ( -68.45,-161.27) ( -68.47,-161.31)    2.88                55
 12/23/2011   11:30:03   (  68.36,   6.15) (  68.37,   6.20)    2.25                23
 12/23/2011   12:20:31   ( -67.55, 174.48) ( -67.59, 172.93)   66.03                69
 12/26/2011   02:56:08   ( -68.41, -45.44) ( -68.43, -45.49)    2.97                36
 12/26/2011   03:46:53   (  68.33, 121.98) (  68.32, 122.02)    1.95                42
 12/28/2011   18:22:26   (  69.03, -97.81) (  68.92, -96.63)   48.44                70
 12/28/2011   19:12:57   ( -68.38,  70.39) ( -68.38,  70.32)    2.66                17
 12/28/2011   20:03:41   (  68.24,-122.13) (  68.26,-122.17)    2.82                60
 12/31/2011   10:39:06   (  68.47,  18.73) (  68.46,  18.67)    2.72                68
 12/31/2011   11:29:47   ( -68.35,-173.80) ( -68.36,-173.82)    1.44                 3
 12/31/2011   12:20:27   (  68.00,  -6.04) (  68.02,  -6.58)   22.39                72
 01/03/2012   02:55:56   (  68.45, 134.53) (  68.43, 134.51)    3.23                48