Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 18.  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)
 06/20/2018   03:46:48   (  68.37, 121.91) 06/20/2018   03:47:45  (  68.38, 121.95)    2.64                57
 06/20/2018   04:37:29   ( -68.24, -70.61) 06/20/2018   04:37:16  ( -68.23, -70.61)    1.90                13
 06/20/2018   05:28:02   (  67.51,  97.60) 06/20/2018   05:26:52  (  67.61,  96.32)   55.65                70
 06/22/2018   20:03:42   (  68.32,-122.26) 06/22/2018   20:04:16  (  68.31,-122.26)    1.46                34
 06/22/2018   20:54:22   ( -68.20,  45.22) 06/22/2018   20:53:45  ( -68.21,  45.25)    1.93                37
 06/25/2018   11:30:01   ( -68.95,-174.62) 06/25/2018   11:31:11  ( -68.80,-173.44)   50.53                70
 06/25/2018   12:20:35   (  68.28,  -6.43) 06/25/2018   12:20:45  (  68.29,  -6.42)    0.83                10
 06/25/2018   13:11:16   ( -68.15, 161.05) 06/25/2018   13:10:16  ( -68.13, 161.04)    2.17                60
 06/28/2018   03:46:45   ( -68.37, -58.08) 06/28/2018   03:47:48  ( -68.38, -58.07)    1.15                63
 06/28/2018   04:37:29   (  68.24, 109.39) 06/28/2018   04:37:15  (  68.26, 109.43)    2.24                14
 06/28/2018   05:28:03   ( -67.73, -82.65) 06/28/2018   05:26:52  ( -67.77, -83.51)   36.35                71
 06/30/2018   20:03:39   ( -68.33,  57.75) 06/30/2018   20:04:18  ( -68.35,  57.77)    2.39                39
 06/30/2018   20:54:23   (  68.20,-134.78) 06/30/2018   20:53:45  (  68.23,-134.74)    3.04                38