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   ( -68.43,-161.32) 09/18/2017   10:40:50  ( -68.42,-161.38)    2.57                66
 09/18/2017   11:30:28   (  68.30,   6.16) 09/18/2017   11:30:17  (  68.31,   6.13)    1.81                11
 09/18/2017   12:21:04   ( -67.89, 173.99) 09/18/2017   12:19:52  ( -67.93, 173.31)   28.51                72
 09/21/2017   02:56:41   ( -68.43, -45.56) 09/21/2017   02:57:19  ( -68.42, -45.50)    2.65                38
 09/21/2017   03:47:24   (  68.25, 121.98) 09/21/2017   03:46:47  (  68.25, 121.94)    1.81                37
 09/23/2017   18:23:02   (  68.90, -97.74) 09/23/2017   18:24:12  (  68.81, -96.78)   39.74                70
 09/23/2017   19:13:36   ( -68.39,  70.27) 09/23/2017   19:13:48  ( -68.38,  70.32)    2.61                12
 09/23/2017   20:04:19   (  68.21,-122.19) 09/23/2017   20:03:16  (  68.20,-122.24)    2.13                63
 09/26/2017   10:39:50   (  68.43,  18.66) 09/26/2017   10:40:48  (  68.44,  18.63)    1.07                58
 09/26/2017   11:30:32   ( -68.35,-173.91) 09/26/2017   11:30:18  ( -68.33,-173.86)    2.71                14
 09/26/2017   12:21:05   (  67.63,  -5.70) 09/26/2017   12:19:55  (  67.66,  -7.00)   55.08                70
 09/29/2017   02:56:46   (  68.40, 134.48) 09/29/2017   02:57:18  (  68.40, 134.46)    0.60                32
 09/29/2017   03:47:28   ( -68.31, -58.09) 09/29/2017   03:46:48  ( -68.30, -58.02)    3.01                40