Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 8.  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)
 04/09/2021   02:04:51   (  68.51, 147.11) 04/09/2021   02:05:50  (  68.53, 147.08)    2.71                59
 04/09/2021   02:55:33   ( -68.44, -45.48) 04/09/2021   02:55:20  ( -68.42, -45.42)    3.24                13
 04/09/2021   03:46:06   (  67.71, 122.75) 04/09/2021   03:44:56  (  67.81, 121.50)   53.59                70
 04/11/2021   18:21:44   (  68.51, -97.12) 04/11/2021   18:22:17  (  68.51, -97.07)    1.73                33
 04/11/2021   19:12:25   ( -68.38,  70.37) 04/11/2021   19:11:47  ( -68.40,  70.43)    3.09                38
 04/14/2021   09:48:01   ( -69.01,-149.32) 04/14/2021   09:49:12  ( -68.93,-148.32)   41.12                71
 04/14/2021   10:38:37   (  68.46,  18.73) 04/14/2021   10:38:45  (  68.48,  18.77)    2.80                 8
 04/14/2021   11:29:18   ( -68.33,-173.78) 04/14/2021   11:28:16  ( -68.32,-173.79)    1.07                62
 04/17/2021   02:04:46   ( -68.53, -32.90) 04/17/2021   02:05:46  ( -68.56, -32.90)    3.18                60
 04/17/2021   02:55:30   (  68.41, 134.57) 04/17/2021   02:55:14  (  68.39, 134.54)    2.67                16
 04/17/2021   03:46:02   ( -67.79, -57.33) 04/17/2021   03:44:52  ( -67.84, -58.48)   48.50                70
 04/19/2021   18:21:40   ( -68.54,  82.87) 04/19/2021   18:22:14  ( -68.53,  82.93)    2.82                34
 04/19/2021   19:12:23   (  68.36,-109.59) 04/19/2021   19:11:42  (  68.35,-109.63)    2.25                41