Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 11.  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)
 04/11/2021   18:21:44   (  68.50, -97.10) 04/11/2021   18:22:17  (  68.52, -97.06)    3.20                33
 04/11/2021   19:12:25   ( -68.37,  70.38) 04/11/2021   19:11:48  ( -68.35,  70.37)    2.29                37
 04/14/2021   09:48:02   ( -69.06,-149.38) 04/14/2021   09:49:12  ( -68.94,-148.31)   44.82                70
 04/14/2021   10:38:37   (  68.44,  18.75) 04/14/2021   10:38:46  (  68.44,  18.72)    1.48                 9
 04/14/2021   11:29:18   ( -68.32,-173.77) 04/14/2021   11:28:16  ( -68.33,-173.78)    1.39                62
 04/17/2021   02:04:47   ( -68.58, -32.95) 04/17/2021   02:05:46  ( -68.57, -32.89)    2.78                59
 04/17/2021   02:55:30   (  68.39, 134.59) 04/17/2021   02:55:14  (  68.40, 134.55)    2.02                16
 04/17/2021   03:46:03   ( -67.83, -57.38) 04/17/2021   03:44:52  ( -67.85, -58.46)   45.60                71
 04/19/2021   18:21:40   ( -68.52,  82.89) 04/19/2021   18:22:14  ( -68.54,  82.95)    2.93                34
 04/19/2021   19:12:22   (  68.34,-109.57) 04/19/2021   19:11:41  (  68.36,-109.62)    3.29                41
 04/22/2021   09:47:56   (  68.88,  30.88) 04/22/2021   09:49:08  (  68.76,  31.47)   26.83                72
 04/22/2021   10:38:32   ( -68.47,-161.26) 04/22/2021   10:38:42  ( -68.44,-161.29)    3.15                10
 04/22/2021   11:29:16   (  68.35,   6.21) 04/22/2021   11:28:09  (  68.32,   6.21)    2.90                67
 04/25/2021   02:04:44   (  68.56, 147.08) 04/25/2021   02:05:39  (  68.55, 147.08)    1.22                55
 04/25/2021   02:55:25   ( -68.41, -45.41) 04/25/2021   02:55:10  ( -68.39, -45.47)    3.22                15
 04/25/2021   03:45:57   (  67.65, 122.86) 04/25/2021   03:44:48  (  67.65, 121.31)   65.34                69