Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 20.  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   (  68.89,  68.67) 09/21/2021   07:18:13  (  68.90,  68.70)    1.36                59
 09/21/2021   08:07:55   ( -68.75,-123.82) 09/21/2021   08:07:44  ( -68.73,-123.87)    2.97                11
 09/21/2021   08:58:29   (  68.09,  44.35) 09/21/2021   08:57:19  (  68.17,  43.10)   52.61                70
 09/23/2021   23:34:09   (  68.83,-175.48) 09/23/2021   23:34:40  (  68.86,-175.46)    2.94                31
 09/24/2021   00:24:50   ( -68.69,  -7.96) 09/24/2021   00:24:11  ( -68.70,  -8.03)    3.02                39
 09/26/2021   15:00:25   ( -69.21, 132.46) 09/26/2021   15:01:36  ( -69.10, 133.08)   27.03                71
 09/26/2021   15:51:04   (  68.83, -59.71) 09/26/2021   15:51:06  (  68.82, -59.64)    3.18                 2
 09/26/2021   16:41:45   ( -68.68, 107.81) 09/26/2021   16:40:37  ( -68.66, 107.80)    2.36                68
 09/29/2021   07:17:15   ( -68.89,-111.32) 09/29/2021   07:18:06  ( -68.90,-111.31)    1.02                51
 09/29/2021   08:07:59   (  68.78,  56.14) 09/29/2021   08:07:33  (  68.77,  56.19)    2.08                26
 09/29/2021   08:58:25   ( -67.82,-135.31) 09/29/2021   08:57:17  ( -67.89,-137.24)   81.12                68
 10/01/2021   22:43:43   (  69.74,-164.07) 10/01/2021   22:44:51  (  69.61,-162.13)   76.36                68
 10/01/2021   23:34:10   ( -68.83,   4.53) 10/01/2021   23:34:33  ( -68.85,   4.51)    1.75                23
 10/02/2021   00:24:54   (  68.73, 171.98) 10/02/2021   00:24:00  (  68.72, 172.00)    1.20                54