Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 28.  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)
 09/29/2017   02:56:46   (  68.38, 134.50) 09/29/2017   02:57:15  (  68.36, 134.44)    2.92                29
 09/29/2017   03:47:27   ( -68.25, -58.02) 09/29/2017   03:46:45  ( -68.26, -58.05)    1.33                42
 10/01/2017   18:23:01   ( -68.70,  82.54) 10/01/2017   18:24:12  ( -68.65,  83.02)   20.21                71
 10/01/2017   19:13:41   (  68.35,-109.69) 10/01/2017   19:13:42  (  68.36,-109.68)    1.81                 1
 10/01/2017   20:04:22   ( -68.22,  57.79) 10/01/2017   20:03:13  ( -68.20,  57.76)    1.87                69
 10/04/2017   10:39:53   ( -68.45,-161.36) 10/04/2017   10:40:43  ( -68.47,-161.31)    3.31                50
 10/04/2017   11:30:37   (  68.32,   6.12) 10/04/2017   11:30:11  (  68.30,   6.12)    2.16                26
 10/04/2017   12:21:03   ( -67.38, 174.60) 10/04/2017   12:19:55  ( -67.41, 172.74)   79.53                68
 10/07/2017   02:06:22   (  69.30, 145.93) 10/07/2017   02:07:30  (  69.17, 147.81)   75.91                68
 10/07/2017   02:56:49   ( -68.42, -45.56) 10/07/2017   02:57:12  ( -68.40, -45.52)    2.81                23
 10/07/2017   03:47:33   (  68.29, 121.92) 10/07/2017   03:46:39  (  68.28, 121.98)    2.83                54
 10/09/2017   18:23:03   (  68.48, -97.18) 10/09/2017   18:24:10  (  68.47, -97.18)    0.32                67
 10/09/2017   19:13:44   ( -68.34,  70.32) 10/09/2017   19:13:41  ( -68.32,  70.27)    3.08                 3
 10/09/2017   20:04:23   (  67.94,-121.87) 10/09/2017   20:03:11  (  68.03,-122.43)   25.25                72