Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 3 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)
 03/08/2021   02:05:02   (  68.55, 147.02) 03/08/2021   02:06:13  (  68.54, 147.11)    3.48                71
 03/08/2021   02:55:42   ( -68.36, -45.42) 03/08/2021   02:55:44  ( -68.37, -45.46)    2.30                 2
 03/08/2021   03:46:25   (  68.18, 122.13) 03/08/2021   03:45:12  (  68.20, 121.98)    6.78                73
 03/10/2021   18:21:55   (  68.46, -97.09) 03/10/2021   18:22:42  (  68.44, -97.13)    2.60                47
 03/10/2021   19:12:36   ( -68.33,  70.40) 03/10/2021   19:12:12  ( -68.34,  70.38)    1.57                24
 03/10/2021   20:03:02   (  67.22,-120.94) 03/10/2021   20:01:56  (  67.27,-123.21)   97.71                66
 03/13/2021   09:48:20   ( -69.41,-149.92) 03/13/2021   09:49:27  ( -69.35,-147.75)   85.23                67
 03/13/2021   10:38:48   (  68.43,  18.72) 03/13/2021   10:39:08  (  68.45,  18.76)    3.02                20
 03/13/2021   11:29:29   ( -68.30,-173.79) 03/13/2021   11:28:39  ( -68.30,-173.79)    0.35                50
 03/16/2021   02:04:58   ( -68.53, -32.94) 03/16/2021   02:06:09  ( -68.53, -32.92)    1.05                71
 03/16/2021   02:55:42   (  68.40, 134.53) 03/16/2021   02:55:36  (  68.40, 134.58)    2.14                 6
 03/16/2021   03:46:21   ( -68.16, -57.84) 03/16/2021   03:45:08  ( -68.19, -58.04)    9.02                73
 03/18/2021   18:21:51   ( -68.45,  82.94) 03/18/2021   18:22:37  ( -68.47,  82.90)    3.19                46
 03/18/2021   19:12:35   (  68.33,-109.60) 03/18/2021   19:12:04  (  68.35,-109.60)    2.62                31