Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 23.  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)
 09/23/2021   23:34:09   (  68.83,-175.48) 09/23/2021   23:34:40  (  68.86,-175.47)    3.12                31
 09/24/2021   00:24:51   ( -68.74,  -8.04) 09/24/2021   00:24:10  ( -68.75,  -7.97)    2.89                41
 09/26/2021   15:00:25   ( -69.21, 132.46) 09/26/2021   15:01:36  ( -69.10, 133.07)   27.29                71
 09/26/2021   15:51:04   (  68.83, -59.71) 09/26/2021   15:51:06  (  68.82, -59.64)    3.08                 2
 09/26/2021   16:41:45   ( -68.68, 107.81) 09/26/2021   16:40:36  ( -68.71, 107.86)    3.36                69
 09/29/2021   07:17:15   ( -68.89,-111.32) 09/29/2021   07:18:06  ( -68.88,-111.32)    0.87                51
 09/29/2021   08:07:59   (  68.78,  56.14) 09/29/2021   08:07:33  (  68.76,  56.17)    2.20                26
 09/29/2021   08:58:25   ( -67.82,-135.31) 09/29/2021   08:57:17  ( -67.88,-137.25)   81.46                68
 10/01/2021   22:43:43   (  69.74,-164.07) 10/01/2021   22:44:50  (  69.65,-162.08)   77.68                67
 10/01/2021   23:34:10   ( -68.84,   4.52) 10/01/2021   23:34:33  ( -68.83,   4.49)    1.66                23
 10/02/2021   00:24:54   (  68.73, 171.97) 10/02/2021   00:24:00  (  68.71, 171.98)    2.53                54
 10/04/2021   15:00:24   (  68.95, -47.17) 10/04/2021   15:01:29  (  68.92, -47.15)    2.84                65
 10/04/2021   15:51:06   ( -68.84, 120.29) 10/04/2021   15:50:59  ( -68.82, 120.36)    3.53                 7
 10/04/2021   16:41:43   (  68.36, -71.77) 10/04/2021   16:40:31  (  68.42, -72.49)   30.39                72