Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 25.  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)
 12/26/2018   10:39:38   ( -68.36,-161.27) 12/26/2018   10:40:32  ( -68.36,-161.30)    1.34                54
 12/26/2018   11:30:22   (  68.24,   6.19) 12/26/2018   11:29:59  (  68.25,   6.22)    1.87                23
 12/26/2018   12:20:50   ( -67.40, 174.55) 12/26/2018   12:19:41  ( -67.47, 172.95)   68.87                69
 12/29/2018   02:56:31   ( -68.32, -45.45) 12/29/2018   02:57:01  ( -68.32, -45.47)    1.00                30
 12/29/2018   03:47:15   (  68.21, 122.01) 12/29/2018   03:46:28  (  68.21, 122.04)    1.43                47
 12/31/2018   18:22:47   (  68.60, -97.36) 12/31/2018   18:23:58  (  68.54, -96.95)   17.48                71
 12/31/2018   19:13:25   ( -68.28,  70.37) 12/31/2018   19:13:31  ( -68.27,  70.35)    1.72                 6
 12/31/2018   20:04:09   (  68.17,-122.18) 12/31/2018   20:02:58  (  68.16,-122.14)    2.54                71
 01/03/2019   10:39:37   (  68.35,  18.73) 01/03/2019   10:40:30  (  68.38,  18.72)    2.77                53
 01/03/2019   11:30:19   ( -68.25,-173.82) 01/03/2019   11:30:00  ( -68.27,-173.77)    3.33                19
 01/03/2019   12:20:49   (  67.38,  -5.44) 01/03/2019   12:19:40  (  67.43,  -7.10)   70.79                69
 01/06/2019   02:56:31   (  68.32, 134.54) 01/06/2019   02:57:00  (  68.32, 134.53)    0.77                29
 01/06/2019   03:47:13   ( -68.22, -58.01) 01/06/2019   03:46:30  ( -68.22, -57.95)    2.17                43