Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 19.  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  (  68.87,  68.66)    1.59                60
 09/21/2021   08:07:56   ( -68.78,-123.86) 09/21/2021   08:07:44  ( -68.76,-123.84)    2.46                12
 09/21/2021   08:58:30   (  68.12,  44.31) 09/21/2021   08:57:20  (  68.14,  43.06)   51.79                70
 09/23/2021   23:34:08   (  68.81,-175.45) 09/23/2021   23:34:40  (  68.83,-175.50)    3.07                32
 09/24/2021   00:24:50   ( -68.72,  -8.00) 09/24/2021   00:24:10  ( -68.73,  -8.00)    1.09                40
 09/26/2021   15:00:25   ( -69.18, 132.50) 09/26/2021   15:01:37  ( -69.08, 133.04)   24.65                72
 09/26/2021   15:51:04   (  68.81, -59.67) 09/26/2021   15:51:07  (  68.79, -59.67)    1.82                 3
 09/26/2021   16:41:46   ( -68.71, 107.78) 09/26/2021   16:40:37  ( -68.69, 107.84)    3.21                69
 09/29/2021   07:17:15   ( -68.86,-111.28) 09/29/2021   07:18:07  ( -68.87,-111.34)    2.52                52
 09/29/2021   08:07:59   (  68.75,  56.17) 09/29/2021   08:07:34  (  68.75,  56.15)    0.84                25
 09/29/2021   08:58:26   ( -67.85,-135.34) 09/29/2021   08:57:18  ( -67.87,-137.26)   80.49                68
 10/01/2021   22:43:44   (  69.76,-164.11) 10/01/2021   22:44:51  (  69.65,-162.08)   79.33                67
 10/01/2021   23:34:11   ( -68.86,   4.49) 10/01/2021   23:34:34  ( -68.83,   4.49)    3.39                23
 10/02/2021   00:24:54   (  68.70, 172.01) 10/02/2021   00:24:01  (  68.70, 171.98)    1.48                53