Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 11.  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)
 12/12/2020   18:22:06   ( -69.40,  81.72) 12/12/2020   18:23:13  ( -69.29,  83.98)   89.36                67
 12/12/2020   19:12:33   (  68.37,-109.56) 12/12/2020   19:12:55  (  68.35,-109.56)    1.90                22
 12/12/2020   20:03:14   ( -68.24,  57.92) 12/12/2020   20:02:25  ( -68.24,  57.94)    0.80                49
 12/15/2020   10:38:43   ( -68.56,-161.34) 12/15/2020   10:39:54  ( -68.53,-161.11)   10.01                71
 12/15/2020   11:29:25   (  68.32,   6.27) 12/15/2020   11:29:23  (  68.30,   6.26)    2.21                 2
 12/15/2020   12:20:06   ( -68.19, 173.76) 12/15/2020   12:18:53  ( -68.19, 173.77)    0.72                73
 12/18/2020   02:55:32   ( -68.40, -45.36) 12/18/2020   02:56:22  ( -68.42, -45.35)    1.91                50
 12/18/2020   03:46:16   (  68.28, 122.10) 12/18/2020   03:45:49  (  68.30, 122.15)    3.29                27
 12/18/2020   04:36:42   ( -67.34, -69.42) 12/18/2020   04:35:34  ( -67.36, -71.30)   80.72                68
 12/20/2020   18:21:59   (  69.36, -98.20) 12/20/2020   18:23:06  (  69.24, -96.07)   84.80                67
 12/20/2020   19:12:24   ( -68.36,  70.47) 12/20/2020   19:12:50  ( -68.36,  70.46)    0.45                26
 12/20/2020   20:03:08   (  68.24,-122.07) 12/20/2020   20:02:17  (  68.24,-122.04)    1.31                51
 12/23/2020   10:38:35   (  68.47,  18.79) 12/23/2020   10:39:47  (  68.45,  18.82)    1.83                72
 12/23/2020   11:29:16   ( -68.32,-173.70) 12/23/2020   11:29:18  ( -68.30,-173.73)    3.06                 2
 12/23/2020   12:19:58   (  68.10,  -6.11) 12/23/2020   12:18:46  (  68.12,  -6.30)    8.30                72