Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 17.  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)
 12/18/2020   02:55:40   ( -68.36, -45.35) 12/18/2020   02:56:24  ( -68.38, -45.41)    3.13                44
 12/18/2020   03:46:25   (  68.28, 122.06) 12/18/2020   03:45:51  (  68.27, 122.10)    2.26                34
 12/20/2020   18:22:05   (  69.04, -97.80) 12/20/2020   18:23:15  (  68.93, -96.49)   53.73                70
 12/20/2020   19:12:36   ( -68.37,  70.41) 12/20/2020   19:12:53  ( -68.38,  70.46)    2.68                17
 12/20/2020   20:03:20   (  68.24,-122.11) 12/20/2020   20:02:21  (  68.21,-122.09)    2.96                59
 12/23/2020   10:38:49   (  68.40,  18.81) 12/23/2020   10:39:53  (  68.42,  18.76)    3.03                64
 12/23/2020   11:29:31   ( -68.32,-173.76) 12/23/2020   11:29:23  ( -68.32,-173.73)    1.05                 8
 12/23/2020   12:20:08   (  67.81,  -5.82) 12/23/2020   12:18:56  (  67.86,  -6.62)   34.17                72
 12/26/2020   02:55:44   (  68.41, 134.56) 12/26/2020   02:56:21  (  68.40, 134.61)    2.41                37
 12/26/2020   03:46:25   ( -68.27, -57.94) 12/26/2020   03:45:52  ( -68.25, -57.94)    2.49                33
 12/28/2020   18:22:06   ( -69.08,  82.13) 12/28/2020   18:23:15  ( -68.95,  83.52)   57.25                69
 12/28/2020   19:12:38   (  68.32,-109.55) 12/28/2020   19:12:51  (  68.33,-109.60)    2.12                13
 12/28/2020   20:03:20   ( -68.23,  57.88) 12/28/2020   20:02:21  ( -68.23,  57.91)    1.20                59