Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 12.  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)
 09/13/2021   07:17:10   ( -68.90,-111.33) 09/13/2021   07:18:22  ( -68.90,-111.29)    1.80                72
 09/13/2021   08:07:53   (  68.72,  56.21) 09/13/2021   08:07:50  (  68.73,  56.15)    2.85                 3
 09/13/2021   08:58:34   ( -68.58,-136.28) 09/13/2021   08:57:20  ( -68.62,-136.35)    5.32                74
 09/15/2021   23:34:05   ( -68.83,   4.53) 09/15/2021   23:34:50  ( -68.83,   4.50)    1.48                45
 09/16/2021   00:24:49   (  68.71, 172.00) 09/16/2021   00:24:17  (  68.71, 172.00)    0.03                32
 09/18/2021   15:00:28   (  69.45, -47.88) 09/18/2021   15:01:38  (  69.35, -46.59)   51.52                70
 09/18/2021   15:51:00   ( -68.82, 120.32) 09/18/2021   15:51:16  ( -68.80, 120.34)    1.97                16
 09/18/2021   16:41:44   (  68.70, -72.22) 09/18/2021   16:40:43  (  68.68, -72.16)    3.19                61
 09/21/2021   07:17:13   (  68.85,  68.73) 09/21/2021   07:18:13  (  68.87,  68.68)    2.96                60
 09/21/2021   08:07:55   ( -68.75,-123.82) 09/21/2021   08:07:43  ( -68.77,-123.82)    2.05                12
 09/21/2021   08:58:29   (  68.10,  44.33) 09/21/2021   08:57:19  (  68.15,  43.07)   52.41                70
 09/23/2021   23:34:09   (  68.85,-175.50) 09/23/2021   23:34:40  (  68.83,-175.50)    1.71                31
 09/24/2021   00:24:51   ( -68.74,  -8.04) 09/24/2021   00:24:10  ( -68.73,  -7.98)    2.57                41