Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 27.  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)
 04/27/2021   18:21:36   (  68.51, -97.08) 04/27/2021   18:22:06  (  68.51, -97.09)    0.31                30
 04/27/2021   19:12:17   ( -68.38,  70.41) 04/27/2021   19:11:36  ( -68.40,  70.41)    1.69                41
 04/30/2021   09:47:51   ( -68.92,-149.16) 04/30/2021   09:49:02  ( -68.83,-148.46)   29.83                71
 04/30/2021   10:38:29   (  68.48,  18.75) 04/30/2021   10:38:33  (  68.50,  18.78)    2.88                 4
 04/30/2021   11:29:10   ( -68.34,-173.76) 04/30/2021   11:28:04  ( -68.33,-173.79)    1.40                66
 05/03/2021   02:04:38   ( -68.56, -32.90) 05/03/2021   02:05:34  ( -68.54, -32.94)    2.93                56
 05/03/2021   02:55:22   (  68.44, 134.57) 05/03/2021   02:55:01  (  68.43, 134.57)    1.88                21
 05/03/2021   03:45:51   ( -67.66, -57.13) 05/03/2021   03:44:42  ( -67.71, -58.64)   64.26                69
 05/05/2021   18:21:31   ( -68.53,  82.93) 05/05/2021   18:22:01  ( -68.52,  82.92)    0.88                30
 05/05/2021   19:12:15   (  68.41,-109.61) 05/05/2021   19:11:28  (  68.40,-109.58)    1.56                47
 05/08/2021   09:47:44   (  68.75,  31.10) 05/08/2021   09:48:55  (  68.70,  31.39)   12.81                71
 05/08/2021   10:38:23   ( -68.49,-161.25) 05/08/2021   10:38:27  ( -68.49,-161.24)    0.38                 4
 05/08/2021   11:29:07   (  68.38,   6.21) 05/08/2021   11:27:54  (  68.37,   6.26)    2.44                73
 05/11/2021   02:04:34   (  68.56, 147.13) 05/11/2021   02:05:24  (  68.55, 147.09)    1.73                50
 05/11/2021   02:55:16   ( -68.46, -45.42) 05/11/2021   02:54:54  ( -68.46, -45.40)    1.09                22
 05/11/2021   03:45:43   (  67.43, 123.16) 05/11/2021   03:44:36  (  67.49, 121.12)   87.21                67