Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 21.  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)
 09/21/2021   07:17:14   (  68.87,  68.70) 09/21/2021   07:18:14  (  68.86,  68.66)    1.73                60
 09/21/2021   08:07:56   ( -68.78,-123.86) 09/21/2021   08:07:44  ( -68.75,-123.84)    3.30                12
 09/21/2021   08:58:30   (  68.12,  44.31) 09/21/2021   08:57:20  (  68.14,  43.06)   51.83                70
 09/23/2021   23:34:08   (  68.81,-175.45) 09/23/2021   23:34:40  (  68.83,-175.51)    2.82                32
 09/24/2021   00:24:50   ( -68.72,  -8.01) 09/24/2021   00:24:10  ( -68.72,  -8.01)    0.06                40
 09/26/2021   15:00:25   ( -69.19, 132.49) 09/26/2021   15:01:36  ( -69.12, 133.10)   25.14                71
 09/26/2021   15:51:04   (  68.81, -59.68) 09/26/2021   15:51:07  (  68.78, -59.68)    2.84                 3
 09/26/2021   16:41:45   ( -68.66, 107.84) 09/26/2021   16:40:37  ( -68.68, 107.82)    2.39                68
 09/29/2021   07:17:15   ( -68.87,-111.29) 09/29/2021   07:18:07  ( -68.86,-111.36)    2.86                52
 09/29/2021   08:07:59   (  68.76,  56.17) 09/29/2021   08:07:34  (  68.74,  56.14)    2.50                25
 09/29/2021   08:58:26   ( -67.85,-135.35) 09/29/2021   08:57:18  ( -67.86,-137.28)   80.97                68
 10/01/2021   22:43:43   (  69.71,-164.04) 10/01/2021   22:44:51  (  69.63,-162.11)   75.16                68
 10/01/2021   23:34:11   ( -68.86,   4.48) 10/01/2021   23:34:33  ( -68.86,   4.53)    1.85                22
 10/02/2021   00:24:54   (  68.70, 172.01) 10/02/2021   00:24:01  (  68.68, 171.95)    3.30                53
 10/04/2021   15:00:23   (  68.92, -47.14) 10/04/2021   15:01:29  (  68.90, -47.17)    2.27                66
 10/04/2021   15:51:05   ( -68.81, 120.33) 10/04/2021   15:50:59  ( -68.81, 120.34)    0.78                 6
 10/04/2021   16:41:42   (  68.33, -71.73) 10/04/2021   16:40:31  (  68.40, -72.51)   32.88                71