Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 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)
 12/15/2020   10:38:46   ( -68.43,-161.20) 12/15/2020   10:39:56  ( -68.41,-161.25)    3.37                70
 12/15/2020   11:29:30   (  68.30,   6.28) 12/15/2020   11:29:23  (  68.30,   6.26)    0.91                 7
 12/15/2020   12:20:08   ( -68.01, 173.97) 12/15/2020   12:18:55  ( -68.08, 173.63)   16.13                73
 12/18/2020   02:55:40   ( -68.37, -45.36) 12/18/2020   02:56:23  ( -68.36, -45.43)    3.11                43
 12/18/2020   03:46:24   (  68.24, 122.11) 12/18/2020   03:45:50  (  68.25, 122.08)    1.25                34
 12/20/2020   18:22:03   (  68.94, -97.67) 12/20/2020   18:23:13  (  68.86, -96.57)   45.32                70
 12/20/2020   19:12:36   ( -68.37,  70.40) 12/20/2020   19:12:50  ( -68.36,  70.46)    2.70                14
 12/20/2020   20:03:19   (  68.19,-122.06) 12/20/2020   20:02:18  (  68.19,-122.10)    1.87                61
 12/23/2020   10:38:49   (  68.41,  18.80) 12/23/2020   10:39:48  (  68.40,  18.76)    1.84                59
 12/23/2020   11:29:31   ( -68.32,-173.77) 12/23/2020   11:29:18  ( -68.30,-173.73)    2.72                13
 12/23/2020   12:20:04   (  67.61,  -5.57) 12/23/2020   12:18:54  (  67.68,  -6.81)   53.30                70
 12/26/2020   02:55:44   (  68.36, 134.63) 12/26/2020   02:56:15  (  68.39, 134.63)    2.84                31
 12/26/2020   03:46:25   ( -68.22, -57.87) 12/26/2020   03:45:46  ( -68.23, -57.92)    3.00                39