Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 17.  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)
 09/18/2021   15:00:29   (  69.47, -47.91) 09/18/2021   15:01:38  (  69.39, -46.54)   54.22                69
 09/18/2021   15:51:00   ( -68.79, 120.35) 09/18/2021   15:51:17  ( -68.78, 120.31)    2.43                17
 09/18/2021   16:41:44   (  68.67, -72.18) 09/18/2021   16:40:44  (  68.67, -72.18)    0.78                60
 09/21/2021   07:17:14   (  68.88,  68.69) 09/21/2021   07:18:14  (  68.86,  68.65)    2.63                60
 09/21/2021   08:07:55   ( -68.73,-123.79) 09/21/2021   08:07:44  ( -68.75,-123.85)    3.24                11
 09/21/2021   08:58:30   (  68.13,  44.30) 09/21/2021   08:57:20  (  68.13,  43.05)   51.77                70
 09/23/2021   23:34:08   (  68.82,-175.46) 09/23/2021   23:34:40  (  68.82,-175.51)    2.18                32
 09/24/2021   00:24:50   ( -68.72,  -8.01) 09/24/2021   00:24:10  ( -68.72,  -8.01)    0.25                40
 09/26/2021   15:00:25   ( -69.19, 132.49) 09/26/2021   15:01:37  ( -69.07, 133.04)   25.39                72
 09/26/2021   15:51:03   (  68.76, -59.61) 09/26/2021   15:51:07  (  68.78, -59.68)    3.56                 4
 09/26/2021   16:41:45   ( -68.66, 107.84) 09/26/2021   16:40:37  ( -68.68, 107.83)    2.41                68
 09/29/2021   07:17:15   ( -68.87,-111.29) 09/29/2021   07:18:07  ( -68.86,-111.35)    2.22                52
 09/29/2021   08:07:59   (  68.76,  56.16) 09/29/2021   08:07:34  (  68.74,  56.14)    2.77                25
 09/29/2021   08:58:26   ( -67.86,-135.35) 09/29/2021   08:57:18  ( -67.86,-137.27)   80.44                68