Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2019 12 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)
 12/21/2019   10:39:02   (  68.41,  18.78) 12/21/2019   10:39:59  (  68.39,  18.74)    2.84                57
 12/21/2019   11:29:43   ( -68.27,-173.73) 12/21/2019   11:29:29  ( -68.27,-173.76)    1.40                14
 12/21/2019   12:20:16   (  67.55,  -5.53) 12/21/2019   12:19:06  (  67.61,  -6.89)   58.05                70
 12/24/2019   02:55:55   (  68.39, 134.57) 12/24/2019   02:56:28  (  68.38, 134.62)    2.10                33
 12/24/2019   03:46:36   ( -68.25, -57.93) 12/24/2019   03:45:58  ( -68.27, -57.89)    2.52                38
 12/26/2019   18:22:13   ( -68.98,  82.27) 12/26/2019   18:23:23  ( -68.87,  83.45)   48.97                70
 12/26/2019   19:12:47   (  68.32,-109.56) 12/26/2019   19:12:58  (  68.32,-109.58)    1.29                11
 12/26/2019   20:03:28   ( -68.18,  57.94) 12/26/2019   20:02:28  ( -68.21,  57.92)    2.87                60
 12/29/2019   10:38:56   ( -68.43,-161.23) 12/29/2019   10:40:00  ( -68.41,-161.23)    1.66                64
 12/29/2019   11:29:40   (  68.31,   6.23) 12/29/2019   11:29:27  (  68.30,   6.28)    2.55                13
 12/29/2019   12:20:15   ( -67.84, 174.14) 12/29/2019   12:19:03  ( -67.86, 173.39)   31.34                72
 01/01/2020   02:55:48   ( -68.41, -45.43) 01/01/2020   02:56:28  ( -68.39, -45.37)    3.34                40
 01/01/2020   03:46:31   (  68.25, 122.09) 01/01/2020   03:45:56  (  68.22, 122.07)    3.34                35