Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 3.  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)
 04/03/2021   18:21:46   ( -68.51,  82.88) 04/03/2021   18:22:23  ( -68.51,  82.93)    2.06                37
 04/03/2021   19:12:30   (  68.37,-109.63) 04/03/2021   19:11:51  (  68.34,-109.62)    3.11                39
 04/06/2021   09:48:06   (  69.00,  30.67) 04/06/2021   09:49:16  (  68.88,  31.64)   40.74                70
 04/06/2021   10:38:39   ( -68.45,-161.26) 04/06/2021   10:38:52  ( -68.44,-161.27)    0.68                13
 04/06/2021   11:29:23   (  68.31,   6.22) 04/06/2021   11:28:19  (  68.33,   6.24)    2.15                64
 04/09/2021   02:04:51   (  68.52, 147.10) 04/09/2021   02:05:50  (  68.53, 147.08)    2.00                59
 04/09/2021   02:55:33   ( -68.44, -45.48) 04/09/2021   02:55:20  ( -68.43, -45.41)    3.07                13
 04/09/2021   03:46:06   (  67.71, 122.74) 04/09/2021   03:44:56  (  67.81, 121.50)   53.18                70
 04/11/2021   18:21:44   (  68.52, -97.12) 04/11/2021   18:22:17  (  68.51, -97.07)    2.41                33
 04/11/2021   19:12:25   ( -68.38,  70.37) 04/11/2021   19:11:48  ( -68.36,  70.38)    3.27                37
 04/14/2021   09:48:02   ( -69.07,-149.40) 04/14/2021   09:49:12  ( -68.94,-148.30)   46.17                70
 04/14/2021   10:38:37   (  68.47,  18.72) 04/14/2021   10:38:45  (  68.49,  18.78)    3.48                 8
 04/14/2021   11:29:18   ( -68.33,-173.79) 04/14/2021   11:28:16  ( -68.33,-173.77)    0.63                62
 04/17/2021   02:04:46   ( -68.54, -32.91) 04/17/2021   02:05:47  ( -68.53, -32.94)    1.82                61
 04/17/2021   02:55:30   (  68.42, 134.55) 04/17/2021   02:55:14  (  68.41, 134.56)    1.88                16