Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2019 1 13.  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)
 01/14/2019   02:56:27   ( -68.31, -45.43) 01/14/2019   02:57:00  ( -68.30, -45.49)    2.13                33
 01/14/2019   03:47:11   (  68.19, 122.03) 01/14/2019   03:46:27  (  68.20, 122.03)    1.32                44
 01/16/2019   18:22:45   (  68.70, -97.49) 01/16/2019   18:23:55  (  68.62, -96.85)   27.33                70
 01/16/2019   19:13:21   ( -68.28,  70.37) 01/16/2019   19:13:29  ( -68.29,  70.38)    0.85                 8
 01/16/2019   20:04:04   (  68.11,-122.11) 01/16/2019   20:02:57  (  68.13,-122.17)    3.01                67
 01/19/2019   10:39:32   (  68.36,  18.72) 01/19/2019   10:40:27  (  68.38,  18.74)    2.91                55
 01/19/2019   11:30:13   ( -68.21,-173.77) 01/19/2019   11:29:58  ( -68.22,-173.82)    2.58                15
 01/19/2019   12:20:45   (  67.45,  -5.52) 01/19/2019   12:19:36  (  67.49,  -7.02)   64.22                69
 01/22/2019   02:56:26   (  68.34, 134.52) 01/22/2019   02:56:57  (  68.31, 134.53)    3.38                31
 01/22/2019   03:47:07   ( -68.19, -57.98) 01/22/2019   03:46:27  ( -68.21, -57.96)    2.00                40
 01/24/2019   18:22:43   ( -68.82,  82.36) 01/24/2019   18:23:54  ( -68.70,  83.24)   37.84                71
 01/24/2019   19:13:19   (  68.28,-109.63) 01/24/2019   19:13:26  (  68.30,-109.60)    2.87                 7
 01/24/2019   20:04:00   ( -68.13,  57.88) 01/24/2019   20:02:57  ( -68.15,  57.85)    2.60                63
 01/27/2019   10:39:29   ( -68.38,-161.29) 01/27/2019   10:40:29  ( -68.36,-161.30)    2.33                60
 01/27/2019   11:30:12   (  68.21,   6.23) 01/27/2019   11:29:56  (  68.24,   6.20)    2.62                16
 01/27/2019   12:20:45   ( -67.63, 174.27) 01/27/2019   12:19:34  ( -67.69, 173.20)   45.74                71