Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 9 20.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2015   09:01:00   (  68.75,  43.79) 09/21/2015   09:01:47  (  68.76,  43.85)    2.60                47
 09/21/2015   09:51:40   ( -68.58,-148.66) 09/21/2015   09:51:18  ( -68.59,-148.73)    2.99                22
 09/21/2015   10:42:07   (  67.52,  19.97) 09/21/2015   10:41:01  (  67.59,  17.73)   95.32                66
 09/24/2015   00:27:23   ( -69.76,  -9.15) 09/24/2015   00:28:30  ( -69.64,  -6.75)   93.54                67
 09/24/2015   01:17:50   (  68.72, 159.61) 09/24/2015   01:18:12  (  68.70, 159.67)    3.21                22
 09/24/2015   02:08:30   ( -68.55, -32.84) 09/24/2015   02:07:43  ( -68.54, -32.90)    2.79                47
 09/26/2015   16:43:58   ( -68.88, 107.87) 09/26/2015   16:45:09  ( -68.86, 108.12)   10.18                71
 09/26/2015   17:34:40   (  68.64, -84.50) 09/26/2015   17:34:38  (  68.63, -84.52)    0.83                 2
 09/26/2015   18:25:21   ( -68.51,  82.98) 09/26/2015   18:24:08  ( -68.53,  82.98)    1.19                73
 09/29/2015   09:00:47   ( -68.74,-136.17) 09/29/2015   09:01:36  ( -68.73,-136.15)    1.86                49
 09/29/2015   09:51:31   (  68.62,  31.31) 09/29/2015   09:51:03  (  68.61,  31.35)    1.85                28
 09/29/2015   10:41:56   ( -67.63,-160.13) 09/29/2015   10:40:48  ( -67.67,-162.13)   84.89                68
 10/02/2015   00:27:11   (  69.60, 171.10) 10/02/2015   00:28:18  (  69.53, 173.15)   80.03                67
 10/02/2015   01:17:37   ( -68.67, -20.29) 10/02/2015   01:18:02  ( -68.64, -20.36)    3.66                25
 10/02/2015   02:08:21   (  68.54, 147.18) 10/02/2015   02:07:29  (  68.52, 147.14)    2.58                52