Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 19.  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)
 06/20/2018   03:46:47   (  68.33, 121.95) 06/20/2018   03:47:45  (  68.36, 121.92)    3.01                58
 06/20/2018   04:37:28   ( -68.21, -70.57) 06/20/2018   04:37:16  ( -68.20, -70.64)    2.98                12
 06/20/2018   05:28:02   (  67.53,  97.58) 06/20/2018   05:26:52  (  67.58,  96.29)   55.00                70
 06/22/2018   20:03:42   (  68.35,-122.29) 06/22/2018   20:04:15  (  68.33,-122.23)    2.61                33
 06/22/2018   20:54:22   ( -68.17,  45.26) 06/22/2018   20:53:46  ( -68.18,  45.21)    2.26                36
 06/25/2018   11:30:01   ( -68.92,-174.59) 06/25/2018   11:31:11  ( -68.81,-173.41)   48.57                70
 06/25/2018   12:20:35   (  68.25,  -6.39) 06/25/2018   12:20:46  (  68.25,  -6.46)    2.72                11
 06/25/2018   13:11:16   ( -68.13, 161.09) 06/25/2018   13:10:16  ( -68.15, 161.06)    3.19                60
 06/28/2018   03:46:45   ( -68.40, -58.12) 06/28/2018   03:47:47  ( -68.39, -58.06)    2.78                62
 06/28/2018   04:37:28   (  68.22, 109.43) 06/28/2018   04:37:15  (  68.21, 109.37)    2.24                13
 06/28/2018   05:28:02   ( -67.71, -82.62) 06/28/2018   05:26:51  ( -67.78, -83.49)   37.70                71
 06/30/2018   20:03:39   ( -68.37,  57.70) 06/30/2018   20:04:17  ( -68.35,  57.77)    3.18                38
 06/30/2018   20:54:22   (  68.18,-134.75) 06/30/2018   20:53:45  (  68.17,-134.80)    2.39                37