Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 30.  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)
 08/30/2021   23:33:57   ( -68.81,   4.57) 08/30/2021   23:35:04  ( -68.82,   4.50)    2.74                67
 08/31/2021   00:24:41   (  68.68, 172.05) 08/31/2021   00:24:31  (  68.71, 172.01)    3.27                10
 08/31/2021   01:15:17   ( -68.28, -20.11) 08/31/2021   01:14:05  ( -68.37, -20.76)   28.93                72
 09/02/2021   15:50:53   ( -68.78, 120.37) 09/02/2021   15:51:30  ( -68.79, 120.36)    1.24                37
 09/02/2021   16:41:37   (  68.66, -72.15) 09/02/2021   16:40:57  (  68.68, -72.14)    2.41                40
 09/05/2021   07:17:12   (  69.12,  68.37) 09/05/2021   07:18:23  (  69.04,  68.91)   23.51                71
 09/05/2021   08:07:49   ( -68.76,-123.83) 09/05/2021   08:07:56  ( -68.76,-123.80)    1.18                 7
 09/05/2021   08:58:33   (  68.64,  43.64) 09/05/2021   08:57:23  (  68.65,  43.70)    2.44                70
 09/07/2021   23:34:03   (  68.84,-175.48) 09/07/2021   23:34:52  (  68.83,-175.47)    1.02                49
 09/08/2021   00:24:45   ( -68.74,  -8.03) 09/08/2021   00:24:22  ( -68.72,  -7.96)    3.37                23
 09/08/2021   01:15:12   (  67.71, 160.60) 09/08/2021   01:14:05  (  67.71, 158.48)   89.58                67
 09/10/2021   15:00:30   ( -69.73, 131.72) 09/10/2021   15:01:38  ( -69.62, 133.80)   81.33                68
 09/10/2021   15:50:57   (  68.77, -59.62) 09/10/2021   15:51:17  (  68.78, -59.65)    1.42                20
 09/10/2021   16:41:39   ( -68.67, 107.83) 09/10/2021   16:40:47  ( -68.68, 107.86)    1.37                52