Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2019 12 16.  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)
 12/16/2019   03:46:43   (  68.23, 122.08) 12/16/2019   03:45:58  (  68.23, 122.08)    0.35                45
 12/18/2019   18:22:15   (  68.74, -97.43) 12/18/2019   18:23:26  (  68.63, -96.84)   27.15                71
 12/18/2019   19:12:51   ( -68.34,  70.42) 12/18/2019   19:12:59  ( -68.34,  70.45)    1.66                 8
 12/18/2019   20:03:35   (  68.21,-122.12) 12/18/2019   20:02:27  (  68.18,-122.10)    3.08                68
 12/21/2019   10:39:02   (  68.40,  18.79) 12/21/2019   10:39:59  (  68.41,  18.77)    1.46                57
 12/21/2019   11:29:44   ( -68.31,-173.78) 12/21/2019   11:29:29  ( -68.30,-173.73)    2.60                15
 12/21/2019   12:20:16   (  67.54,  -5.51) 12/21/2019   12:19:07  (  67.57,  -6.92)   59.89                69
 12/24/2019   02:55:55   (  68.38, 134.59) 12/24/2019   02:56:29  (  68.36, 134.59)    2.50                34
 12/24/2019   03:46:36   ( -68.24, -57.91) 12/24/2019   03:45:59  ( -68.25, -57.90)    1.54                37
 12/26/2019   18:22:14   ( -69.01,  82.21) 12/26/2019   18:23:24  ( -68.86,  83.45)   52.17                70
 12/26/2019   19:12:47   (  68.31,-109.55) 12/26/2019   19:12:59  (  68.31,-109.59)    1.93                12
 12/26/2019   20:03:29   ( -68.22,  57.89) 12/26/2019   20:02:29  ( -68.20,  57.92)    2.34                60
 12/29/2019   10:38:55   ( -68.41,-161.21) 12/29/2019   10:40:00  ( -68.42,-161.22)    1.32                65
 12/29/2019   11:29:39   (  68.30,   6.24) 12/29/2019   11:29:27  (  68.31,   6.29)    2.03                12
 12/29/2019   12:20:14   ( -67.83, 174.16) 12/29/2019   12:19:02  ( -67.93, 173.47)   30.62                72