Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 6 15.  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)
 06/17/2018   11:30:00   (  68.73,   5.65) 06/17/2018   11:31:11  (  68.63,   6.37)   31.31                71
 06/17/2018   12:20:35   ( -68.29, 173.56) 06/17/2018   12:20:45  ( -68.30, 173.61)    3.08                10
 06/17/2018   13:11:19   (  68.15, -18.96) 06/17/2018   13:10:13  (  68.13, -18.95)    1.74                66
 06/20/2018   03:46:48   (  68.36, 121.91) 06/20/2018   03:47:46  (  68.35, 121.90)    2.09                58
 06/20/2018   04:37:29   ( -68.24, -70.61) 06/20/2018   04:37:16  ( -68.25, -70.58)    1.74                13
 06/20/2018   05:28:03   (  67.56,  97.54) 06/20/2018   05:26:53  (  67.57,  96.27)   53.76                70
 06/22/2018   20:03:41   (  68.32,-122.26) 06/22/2018   20:04:15  (  68.34,-122.23)    2.88                34
 06/22/2018   20:54:22   ( -68.19,  45.23) 06/22/2018   20:53:46  ( -68.20,  45.23)    0.44                36
 06/25/2018   11:30:01   ( -68.95,-174.62) 06/25/2018   11:31:11  ( -68.86,-173.36)   51.26                70
 06/25/2018   12:20:35   (  68.28,  -6.43) 06/25/2018   12:20:46  (  68.29,  -6.42)    0.98                11
 06/25/2018   13:11:16   ( -68.15, 161.06) 06/25/2018   13:10:17  ( -68.14, 161.04)    0.88                59
 06/28/2018   03:46:45   ( -68.37, -58.08) 06/28/2018   03:47:50  ( -68.36, -58.10)    1.11                65
 06/28/2018   04:37:29   (  68.24, 109.39) 06/28/2018   04:37:17  (  68.23, 109.39)    1.00                12
 06/28/2018   05:28:04   ( -67.79, -82.71) 06/28/2018   05:26:52  ( -67.87, -83.41)   30.47                72