Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 20.  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)
 06/22/2021   16:40:58   ( -69.16, 107.28) 06/22/2021   16:42:09  ( -69.06, 108.32)   42.74                71
 06/22/2021   17:31:34   (  68.61, -84.66) 06/22/2021   17:31:42  (  68.61, -84.59)    2.83                 8
 06/22/2021   18:22:15   ( -68.47,  82.85) 06/22/2021   18:21:13  ( -68.45,  82.84)    2.29                62
 06/25/2021   08:57:46   ( -68.65,-136.26) 06/25/2021   08:58:43  ( -68.65,-136.31)    2.26                57
 06/25/2021   09:48:30   (  68.53,  31.21) 06/25/2021   09:48:10  (  68.53,  31.19)    0.93                20
 06/25/2021   10:39:00   ( -67.80,-160.54) 06/25/2021   10:37:50  ( -67.87,-161.96)   60.28                70
 06/28/2021   00:24:19   (  69.68, 170.75) 06/28/2021   00:25:25  (  69.56, 173.10)   92.23                66
 06/28/2021   01:14:43   ( -68.63, -20.46) 06/28/2021   01:15:10  ( -68.62, -20.47)    0.73                27
 06/28/2021   02:05:27   (  68.51, 147.00) 06/28/2021   02:04:37  (  68.50, 147.03)    1.62                50
 06/30/2021   16:40:58   (  68.70, -72.11) 06/30/2021   16:42:07  (  68.69, -72.14)    1.75                69
 06/30/2021   17:31:40   ( -68.60,  95.34) 06/30/2021   17:31:37  ( -68.59,  95.37)    2.16                 3
 06/30/2021   18:22:19   (  68.22, -96.86) 06/30/2021   18:21:07  (  68.30, -97.33)   21.56                72
 07/03/2021   08:57:54   (  68.68,  43.68) 07/03/2021   08:58:33  (  68.65,  43.70)    3.33                39
 07/03/2021   09:48:35   ( -68.53,-148.80) 07/03/2021   09:48:03  ( -68.56,-148.79)    3.05                32