Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 4 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)
 04/19/2017   10:39:07   (  68.75,  18.33) 04/19/2017   10:40:18  (  68.62,  19.01)   31.14                71
 04/19/2017   11:29:42   ( -68.28,-173.73) 04/19/2017   11:29:52  ( -68.29,-173.76)    1.21                10
 04/19/2017   12:20:26   (  68.16,  -6.28) 04/19/2017   12:19:19  (  68.18,  -6.24)    2.38                67
 04/22/2017   02:55:55   (  68.38, 134.58) 04/22/2017   02:56:51  (  68.41, 134.63)    3.16                56
 04/22/2017   03:46:36   ( -68.23, -57.91) 04/22/2017   03:46:22  ( -68.24, -57.94)    1.56                14
 04/22/2017   04:37:09   (  67.52, 110.28) 04/22/2017   04:35:59  (  67.57, 108.93)   57.57                70
 04/24/2017   19:12:50   (  68.34,-109.59) 04/24/2017   19:13:22  (  68.36,-109.56)    2.15                32
 04/24/2017   20:03:31   ( -68.19,  57.92) 04/24/2017   20:02:53  ( -68.19,  57.88)    1.56                38
 04/27/2017   10:39:09   ( -68.84,-161.80) 04/27/2017   10:40:20  ( -68.75,-160.85)   39.50                71
 04/27/2017   11:29:45   (  68.30,   6.22) 04/27/2017   11:29:53  (  68.30,   6.25)    1.15                 8
 04/27/2017   12:20:26   ( -68.15, 173.74) 04/27/2017   12:19:24  ( -68.14, 173.69)    2.20                62
 04/30/2017   02:55:56   ( -68.38, -45.41) 04/30/2017   02:56:57  ( -68.36, -45.45)    3.07                61
 04/30/2017   03:46:40   (  68.27, 122.04) 04/30/2017   03:46:24  (  68.24, 122.06)    3.01                16
 04/30/2017   04:37:13   ( -67.68, -69.91) 04/30/2017   04:36:02  ( -67.69, -70.95)   43.85                71
 05/02/2017   19:12:50   ( -68.35,  70.40) 05/02/2017   19:13:26  ( -68.35,  70.42)    0.76                36
 05/02/2017   20:03:33   (  68.18,-122.08) 05/02/2017   20:02:54  (  68.18,-122.14)    2.46                39