Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 16.  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   02:55:41   ( -68.40, -45.40) 12/18/2020   02:56:23  ( -68.39, -45.40)    1.97                42
 12/18/2020   03:46:25   (  68.27, 122.08) 12/18/2020   03:45:50  (  68.28, 122.12)    1.76                35
 12/20/2020   18:22:04   (  68.97, -97.71) 12/20/2020   18:23:14  (  68.83, -96.60)   47.20                70
 12/20/2020   19:12:36   ( -68.35,  70.43) 12/20/2020   19:12:51  ( -68.33,  70.42)    2.15                15
 12/20/2020   20:03:20   (  68.22,-122.10) 12/20/2020   20:02:18  (  68.22,-122.07)    1.35                62
 12/23/2020   10:38:49   (  68.44,  18.76) 12/23/2020   10:39:47  (  68.44,  18.80)    1.83                58
 12/23/2020   11:29:30   ( -68.30,-173.74) 12/23/2020   11:29:18  ( -68.27,-173.76)    3.42                12
 12/23/2020   12:20:04   (  67.64,  -5.61) 12/23/2020   12:18:54  (  67.65,  -6.84)   52.32                70
 12/26/2020   02:55:43   (  68.35, 134.65) 12/26/2020   02:56:15  (  68.37, 134.60)    2.92                32
 12/26/2020   03:46:25   ( -68.26, -57.92) 12/26/2020   03:45:45  ( -68.26, -57.89)    1.30                40
 12/28/2020   18:22:00   ( -68.74,  82.58) 12/28/2020   18:23:12  ( -68.64,  83.17)   26.43                72
 12/28/2020   19:12:39   (  68.36,-109.60) 12/28/2020   19:12:42  (  68.35,-109.54)    3.12                 3
 12/28/2020   20:03:20   ( -68.21,  57.90) 12/28/2020   20:02:13  ( -68.19,  57.91)    2.45                67