Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 16.  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)
 09/18/2017   10:39:44   ( -68.44,-161.33) 09/18/2017   10:40:49  ( -68.44,-161.35)    1.03                65
 09/18/2017   11:30:28   (  68.31,   6.15) 09/18/2017   11:30:16  (  68.33,   6.16)    2.62                12
 09/18/2017   12:21:03   ( -67.85, 174.04) 09/18/2017   12:19:51  ( -67.94, 173.34)   31.38                72
 09/21/2017   02:56:40   ( -68.39, -45.50) 09/21/2017   02:57:18  ( -68.39, -45.53)    1.39                38
 09/21/2017   03:47:24   (  68.26, 121.98) 09/21/2017   03:46:45  (  68.28, 121.98)    2.04                39
 09/23/2017   18:23:00   (  68.80, -97.59) 09/23/2017   18:24:11  (  68.71, -96.89)   30.11                71
 09/23/2017   19:13:35   ( -68.34,  70.33) 09/23/2017   19:13:46  ( -68.32,  70.27)    3.17                11
 09/23/2017   20:04:19   (  68.21,-122.20) 09/23/2017   20:03:13  (  68.21,-122.22)    1.18                66
 09/26/2017   10:39:50   (  68.43,  18.66) 09/26/2017   10:40:43  (  68.45,  18.68)    2.43                53
 09/26/2017   11:30:31   ( -68.30,-173.84) 09/26/2017   11:30:14  ( -68.29,-173.88)    1.46                17
 09/26/2017   12:21:02   (  67.47,  -5.51) 09/26/2017   12:19:53  (  67.50,  -7.15)   70.07                69
 09/29/2017   02:56:46   (  68.39, 134.48) 09/29/2017   02:57:11  (  68.41, 134.51)    2.13                25
 09/29/2017   03:47:27   ( -68.25, -58.02) 09/29/2017   03:46:42  ( -68.25, -58.05)    1.18                45