Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 5 20.  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)
 05/21/2021   17:31:10   (  68.60, -84.57) 05/21/2021   17:32:14  (  68.62, -84.59)    2.02                64
 05/21/2021   18:21:52   ( -68.51,  82.87) 05/21/2021   18:21:44  ( -68.51,  82.91)    1.76                 8
 05/21/2021   19:12:29   (  68.01,-109.18) 05/21/2021   19:11:17  (  68.06,-109.98)   33.60                72
 05/24/2021   09:48:06   (  68.54,  31.28) 05/24/2021   09:48:41  (  68.56,  31.22)    3.32                35
 05/24/2021   10:38:48   ( -68.44,-161.28) 05/24/2021   10:38:11  ( -68.45,-161.28)    0.67                37
 05/27/2021   01:14:25   ( -68.96, -20.84) 05/27/2021   01:15:37  ( -68.83, -20.21)   29.28                72
 05/27/2021   02:05:03   (  68.53, 147.05) 05/27/2021   02:05:07  (  68.55, 147.09)    2.15                 4
 05/27/2021   02:55:44   ( -68.38, -45.43) 05/27/2021   02:54:38  ( -68.39, -45.47)    1.89                66
 05/29/2021   17:31:14   ( -68.58,  95.44) 05/29/2021   17:32:06  ( -68.60,  95.38)    2.77                52
 05/29/2021   18:21:58   (  68.47, -97.10) 05/29/2021   18:21:33  (  68.47, -97.12)    0.64                25
 05/29/2021   19:12:25   ( -67.56,  71.35) 05/29/2021   19:11:17  ( -67.59,  69.49)   79.22                68
 06/01/2021   08:57:43   (  69.43,  42.72) 06/01/2021   08:58:51  (  69.29,  44.51)   71.84                68
 06/01/2021   09:48:11   ( -68.58,-148.79) 06/01/2021   09:48:32  ( -68.58,-148.75)    1.32                21
 06/01/2021   10:38:54   (  68.42,  18.73) 06/01/2021   10:38:00  (  68.39,  18.67)    3.50                54