Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 7.  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)
 09/07/2017   20:04:09   (  68.21,-122.17) 09/07/2017   20:03:17  (  68.23,-122.19)    2.15                52
 09/10/2017   10:39:41   (  68.47,  18.63) 09/10/2017   10:40:49  (  68.45,  18.67)    3.04                68
 09/10/2017   11:30:22   ( -68.33,-173.87) 09/10/2017   11:30:19  ( -68.35,-173.82)    2.39                 3
 09/10/2017   12:21:02   (  67.99,  -6.13) 09/10/2017   12:19:49  (  68.07,  -6.51)   17.80                73
 09/13/2017   02:56:37   (  68.42, 134.47) 09/13/2017   02:57:19  (  68.40, 134.48)    2.65                42
 09/13/2017   03:47:18   ( -68.28, -58.03) 09/13/2017   03:46:49  ( -68.29, -58.01)    1.91                29
 09/15/2017   18:23:01   ( -69.18,  81.90) 09/15/2017   18:24:10  ( -69.06,  83.55)   66.75                69
 09/15/2017   19:13:32   (  68.37,-109.70) 09/15/2017   19:13:47  (  68.39,-109.64)    3.52                15
 09/15/2017   20:04:13   ( -68.22,  57.80) 09/15/2017   20:03:18  ( -68.23,  57.80)    1.17                55
 09/18/2017   10:39:44   ( -68.44,-161.33) 09/18/2017   10:40:50  ( -68.45,-161.35)    1.07                66
 09/18/2017   11:30:28   (  68.32,   6.13) 09/18/2017   11:30:17  (  68.33,   6.16)    1.38                11
 09/18/2017   12:21:04   ( -67.90, 173.97) 09/18/2017   12:19:52  ( -67.95, 173.34)   26.93                72
 09/21/2017   02:56:40   ( -68.39, -45.50) 09/21/2017   02:57:20  ( -68.38, -45.55)    2.42                40
 09/21/2017   03:47:24   (  68.27, 121.96) 09/21/2017   03:46:47  (  68.26, 121.95)    1.52                37