Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 9 13.  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)
 09/13/2015   09:01:08   ( -68.74,-136.20) 09/13/2015   09:02:00  ( -68.72,-136.24)    2.55                52
 09/13/2015   09:51:52   (  68.60,  31.28) 09/13/2015   09:51:27  (  68.61,  31.27)    1.39                25
 09/13/2015   10:42:19   ( -67.73,-160.29) 09/13/2015   10:41:10  ( -67.77,-162.10)   76.18                69
 09/16/2015   00:27:35   (  69.72, 170.87) 09/16/2015   00:28:41  (  69.63, 173.20)   90.56                66
 09/16/2015   01:17:59   ( -68.69, -20.37) 09/16/2015   01:18:26  ( -68.69, -20.39)    1.43                27
 09/16/2015   02:08:43   (  68.56, 147.12) 09/16/2015   02:07:53  (  68.57, 147.11)    1.64                50
 09/18/2015   16:44:10   (  68.83, -72.09) 09/18/2015   16:45:21  (  68.80, -71.99)    5.41                71
 09/18/2015   17:34:50   ( -68.65,  95.47) 09/18/2015   17:34:52  ( -68.64,  95.44)    2.11                 2
 09/18/2015   18:25:33   (  68.47, -96.98) 09/18/2015   18:24:20  (  68.46, -97.12)    5.74                73
 09/21/2015   09:00:59   (  68.74,  43.81) 09/21/2015   09:01:46  (  68.73,  43.82)    0.97                47
 09/21/2015   09:51:40   ( -68.61,-148.70) 09/21/2015   09:51:16  ( -68.63,-148.67)    2.03                24
 09/21/2015   10:42:06   (  67.51,  19.99) 09/21/2015   10:41:00  (  67.56,  17.71)   96.92                66
 09/24/2015   00:27:23   ( -69.73,  -9.12) 09/24/2015   00:28:30  ( -69.60,  -6.80)   90.84                67
 09/24/2015   01:17:50   (  68.70, 159.63) 09/24/2015   01:18:11  (  68.71, 159.69)    2.35                21
 09/24/2015   02:08:31   ( -68.57, -32.88) 09/24/2015   02:07:42  ( -68.55, -32.87)    2.89                49
 09/26/2015   16:43:57   ( -68.79, 107.98) 09/26/2015   16:45:09  ( -68.79, 108.05)    2.58                72
 09/26/2015   17:34:40   (  68.62, -84.47) 09/26/2015   17:34:37  (  68.61, -84.53)    2.35                 3
 09/26/2015   18:25:21   ( -68.48,  83.02) 09/26/2015   18:24:07  ( -68.51,  82.98)    3.31                74