Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2013 1 22.  Predictions up to the next  14.0 days:

     Date     Time(NPP)   NPP Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2013   20:01:44   ( -68.23,  57.87) ( -68.25,  57.87)    2.45                65
 01/23/2013   20:52:28   (  68.09,-134.64) (  68.09,-134.68)    1.53                11
 01/23/2013   21:43:04   ( -67.70,  33.17) ( -67.76,  32.57)   26.08                73
 01/26/2013   12:18:42   ( -68.18, 173.69) ( -68.16, 173.65)    2.73                37
 01/26/2013   13:09:26   (  68.04, -18.82) (  68.05, -18.84)    1.09                40
 01/29/2013   03:45:02   (  68.48, 121.75) (  68.38, 122.16)   20.01                72
 01/29/2013   04:35:39   ( -68.13, -70.49) ( -68.11, -70.53)    2.48                 8
 01/29/2013   05:26:23   (  67.99,  96.99) (  68.00,  96.98)    0.53                69
 01/31/2013   20:01:56   (  68.22,-122.16) (  68.21,-122.16)    1.22                49
 01/31/2013   20:52:37   ( -68.08,  45.33) ( -68.11,  45.35)    3.10                22
 01/31/2013   21:43:05   (  67.08,-146.15) (  67.14,-148.09)   84.27                68
 02/03/2013   11:28:26   ( -69.16,-174.96) ( -69.03,-172.91)   82.65                67
 02/03/2013   12:18:54   (  68.18,  -6.35) (  68.19,  -6.30)    2.20                19
 02/03/2013   13:09:35   ( -68.03, 161.15) ( -68.03, 161.15)    0.17                51