Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 7 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)
 07/22/2018   03:46:46   (  68.41, 121.90) 07/22/2018   03:47:46  (  68.40, 121.95)    2.19                60
 07/22/2018   04:37:26   ( -68.22, -70.54) 07/22/2018   04:37:17  ( -68.24, -70.61)    3.48                 9
 07/22/2018   05:28:02   (  67.65,  97.47) 07/22/2018   05:26:51  (  67.73,  96.45)   44.24                71
 07/24/2018   20:03:42   (  68.34,-122.24) 07/24/2018   20:04:16  (  68.33,-122.25)    0.64                34
 07/24/2018   20:54:23   ( -68.20,  45.25) 07/24/2018   20:53:46  ( -68.23,  45.26)    3.28                37
 07/27/2018   11:30:01   ( -68.82,-174.43) 07/27/2018   11:31:12  ( -68.71,-173.55)   37.28                71
 07/27/2018   12:20:37   (  68.27,  -6.39) 07/27/2018   12:20:45  (  68.26,  -6.45)    2.70                 8
 07/27/2018   13:11:19   ( -68.18, 161.04) 07/27/2018   13:10:15  ( -68.16, 161.06)    2.30                64
 07/30/2018   03:46:50   ( -68.37, -58.07) 07/30/2018   03:47:47  ( -68.37, -58.10)    1.35                57
 07/30/2018   04:37:34   (  68.25, 109.39) 07/30/2018   04:37:14  (  68.25, 109.41)    1.05                20
 07/30/2018   05:28:04   ( -67.52, -82.37) 07/30/2018   05:26:54  ( -67.59, -83.72)   57.87                70
 08/01/2018   19:13:24   (  69.47,-111.12) 08/01/2018   19:14:30  (  69.34,-108.62)   98.74                66
 08/01/2018   20:03:47   ( -68.36,  57.72) 08/01/2018   20:04:16  ( -68.35,  57.76)    1.94                29
 08/01/2018   20:54:30   (  68.19,-134.76) 08/01/2018   20:53:44  (  68.17,-134.80)    2.43                46