Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 8 18.  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)
 08/20/2017   02:56:18   ( -68.42, -45.47) 08/20/2017   02:57:18  ( -68.44, -45.44)    2.84                60
 08/20/2017   03:47:02   (  68.30, 121.99) 08/20/2017   03:46:46  (  68.28, 122.01)    2.62                16
 08/20/2017   04:37:34   ( -67.67, -69.90) 08/20/2017   04:36:24  ( -67.72, -71.01)   47.00                70
 08/22/2017   19:13:14   ( -68.40,  70.32) 08/22/2017   19:13:48  ( -68.39,  70.37)    2.24                34
 08/22/2017   20:03:57   (  68.23,-122.16) 08/22/2017   20:03:16  (  68.23,-122.18)    1.11                41
 08/25/2017   10:39:34   (  68.74,  18.31) 08/25/2017   10:40:45  (  68.67,  18.96)   27.50                71
 08/25/2017   11:30:10   ( -68.32,-173.82) 08/25/2017   11:30:19  ( -68.35,-173.81)    2.63                 9
 08/25/2017   12:20:54   (  68.21,  -6.37) 08/25/2017   12:19:47  (  68.18,  -6.36)    3.49                67
 08/28/2017   02:56:25   (  68.41, 134.52) 08/28/2017   02:57:20  (  68.41, 134.51)    0.56                55
 08/28/2017   03:47:07   ( -68.30, -58.03) 08/28/2017   03:46:50  ( -68.31, -57.98)    2.08                17
 08/28/2017   04:37:38   (  67.49, 110.29) 08/28/2017   04:36:29  (  67.52, 108.75)   65.42                69
 08/30/2017   19:13:22   (  68.39,-109.70) 08/30/2017   19:13:51  (  68.37,-109.66)    2.49                29
 08/30/2017   20:04:03   ( -68.23,  57.82) 08/30/2017   20:03:22  ( -68.22,  57.78)    2.50                41