Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 9 6.  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)
 09/07/2021   23:34:03   (  68.83,-175.47) 09/07/2021   23:34:55  (  68.85,-175.45)    2.73                52
 09/08/2021   00:24:44   ( -68.69,  -7.96) 09/08/2021   00:24:26  ( -68.69,  -8.03)    2.65                18
 09/08/2021   01:15:14   (  67.81, 160.48) 09/08/2021   01:14:06  (  67.85, 158.62)   78.04                68
 09/10/2021   15:50:59   (  68.81, -59.67) 09/10/2021   15:51:23  (  68.79, -59.66)    2.78                24
 09/10/2021   16:41:40   ( -68.67, 107.84) 09/10/2021   16:40:53  ( -68.68, 107.84)    1.42                47
 09/13/2021   07:17:10   ( -68.91,-111.35) 09/13/2021   07:18:22  ( -68.89,-111.30)    3.21                72
 09/13/2021   08:07:53   (  68.74,  56.19) 09/13/2021   08:07:49  (  68.77,  56.20)    3.22                 4
 09/13/2021   08:58:33   ( -68.54,-136.23) 09/13/2021   08:57:21  ( -68.56,-136.43)    8.45                72
 09/15/2021   23:34:05   ( -68.84,   4.51) 09/15/2021   23:34:50  ( -68.82,   4.49)    2.93                45
 09/16/2021   00:24:48   (  68.68, 172.05) 09/16/2021   00:24:17  (  68.70, 171.98)    3.33                31
 09/18/2021   15:00:29   (  69.46, -47.90) 09/18/2021   15:01:38  (  69.39, -46.53)   54.20                69
 09/18/2021   15:51:00   ( -68.77, 120.38) 09/18/2021   15:51:17  ( -68.80, 120.34)    2.78                17
 09/18/2021   16:41:44   (  68.67, -72.17) 09/18/2021   16:40:44  (  68.67, -72.17)    0.43                60