Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 22.  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)
 09/23/2017   18:23:02   (  68.87, -97.69) 09/23/2017   18:24:12  (  68.75, -96.83)   36.80                70
 09/23/2017   19:13:36   ( -68.36,  70.30) 09/23/2017   19:13:47  ( -68.37,  70.33)    1.18                11
 09/23/2017   20:04:20   (  68.23,-122.22) 09/23/2017   20:03:14  (  68.25,-122.16)    3.47                66
 09/26/2017   10:39:50   (  68.45,  18.63) 09/26/2017   10:40:45  (  68.44,  18.66)    2.12                55
 09/26/2017   11:30:31   ( -68.32,-173.87) 09/26/2017   11:30:15  ( -68.33,-173.83)    2.21                16
 09/26/2017   12:21:03   (  67.54,  -5.59) 09/26/2017   12:19:53  (  67.60,  -7.04)   61.90                70
 09/29/2017   02:56:46   (  68.41, 134.45) 09/29/2017   02:57:14  (  68.39, 134.49)    2.44                28
 09/29/2017   03:47:27   ( -68.28, -58.05) 09/29/2017   03:46:44  ( -68.29, -58.00)    2.87                43
 10/01/2017   18:23:02   ( -68.72,  82.51) 10/01/2017   18:24:13  ( -68.64,  83.02)   22.32                71
 10/01/2017   19:13:42   (  68.38,-109.73) 10/01/2017   19:13:43  (  68.35,-109.68)    3.25                 1
 10/01/2017   20:04:22   ( -68.19,  57.83) 10/01/2017   20:03:14  ( -68.20,  57.76)    3.15                68
 10/04/2017   10:39:53   ( -68.41,-161.32) 10/04/2017   10:40:45  ( -68.43,-161.36)    2.34                52
 10/04/2017   11:30:37   (  68.29,   6.15) 10/04/2017   11:30:12  (  68.30,   6.14)    2.14                25
 10/04/2017   12:21:04   ( -67.39, 174.58) 10/04/2017   12:19:56  ( -67.43, 172.76)   77.67                68