Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 4 21.  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)
 04/22/2020   02:55:51   ( -68.34, -45.41) 04/22/2020   02:56:57  ( -68.35, -45.48)    3.34                66
 04/22/2020   03:46:36   (  68.26, 121.99) 04/22/2020   03:46:24  (  68.24, 122.03)    3.04                12
 04/22/2020   04:37:11   ( -67.80, -70.12) 04/22/2020   04:35:59  ( -67.85, -70.79)   28.83                72
 04/24/2020   19:12:46   ( -68.33,  70.37) 04/24/2020   19:13:24  ( -68.35,  70.41)    2.96                38
 04/24/2020   20:03:30   (  68.20,-122.16) 04/24/2020   20:02:52  (  68.18,-122.15)    2.78                38
 04/27/2020   10:39:06   (  68.78,  18.22) 04/27/2020   10:40:17  (  68.67,  19.05)   35.86                71
 04/27/2020   11:29:40   ( -68.26,-173.77) 04/27/2020   11:29:52  ( -68.29,-173.78)    2.44                12
 04/27/2020   12:20:24   (  68.14,  -6.32) 04/27/2020   12:19:19  (  68.17,  -6.28)    2.97                65
 04/30/2020   02:55:52   (  68.35, 134.57) 04/30/2020   02:56:48  (  68.37, 134.58)    2.59                56
 04/30/2020   03:46:33   ( -68.20, -57.93) 04/30/2020   03:46:19  ( -68.22, -57.97)    2.41                14
 04/30/2020   04:37:06   (  67.49, 110.26) 04/30/2020   04:35:56  (  67.53, 108.89)   58.68                70
 05/02/2020   19:12:46   (  68.30,-109.59) 05/02/2020   19:13:16  (  68.30,-109.62)    0.99                30
 05/02/2020   20:03:28   ( -68.20,  57.85) 05/02/2020   20:02:46  ( -68.20,  57.90)    1.93                42