Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 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)
 12/26/2020   02:55:44   (  68.41, 134.57) 12/26/2020   02:56:21  (  68.38, 134.59)    2.54                37
 12/26/2020   03:46:25   ( -68.27, -57.94) 12/26/2020   03:45:51  ( -68.27, -57.91)    1.16                34
 12/28/2020   18:22:05   ( -69.03,  82.20) 12/28/2020   18:23:15  ( -68.91,  83.47)   52.36                70
 12/28/2020   19:12:39   (  68.37,-109.61) 12/28/2020   19:12:50  (  68.36,-109.57)    2.25                11
 12/28/2020   20:03:20   ( -68.23,  57.88) 12/28/2020   20:02:20  ( -68.25,  57.94)    3.04                60
 12/31/2020   10:38:50   ( -68.45,-161.26) 12/31/2020   10:39:52  ( -68.43,-161.24)    2.06                62
 12/31/2020   11:29:34   (  68.33,   6.20) 12/31/2020   11:29:19  (  68.32,   6.27)    2.98                15
 12/31/2020   12:20:07   ( -67.76, 174.24) 12/31/2020   12:18:56  ( -67.83, 173.32)   39.32                71
 01/03/2021   02:55:45   ( -68.41, -45.45) 01/03/2021   02:56:21  ( -68.40, -45.41)    2.43                36
 01/03/2021   03:46:28   (  68.24, 122.08) 01/03/2021   03:45:49  (  68.22, 122.03)    2.94                39
 01/05/2021   18:22:03   (  68.80, -97.51) 01/05/2021   18:23:14  (  68.73, -96.75)   31.37                71
 01/05/2021   19:12:38   ( -68.32,  70.43) 01/05/2021   19:12:49  ( -68.35,  70.42)    3.35                11
 01/05/2021   20:03:22   (  68.21,-122.11) 01/05/2021   20:02:16  (  68.23,-122.08)    2.77                66