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   18:22:59   (  69.30, -98.26) 09/07/2017   18:24:06  (  69.21, -96.24)   79.86                67
 09/07/2017   19:13:25   ( -68.36,  70.34) 09/07/2017   19:13:49  ( -68.38,  70.34)    2.96                24
 09/07/2017   20:04:09   (  68.23,-122.19) 09/07/2017   20:03:17  (  68.22,-122.21)    1.54                52
 09/10/2017   10:39:40   (  68.44,  18.68) 09/10/2017   10:40:49  (  68.45,  18.67)    1.80                69
 09/10/2017   11:30:22   ( -68.35,-173.89) 09/10/2017   11:30:19  ( -68.35,-173.82)    2.80                 3
 09/10/2017   12:21:02   (  68.01,  -6.15) 09/10/2017   12:19:49  (  68.07,  -6.51)   16.29                73
 09/13/2017   02:56:37   (  68.44, 134.45) 09/13/2017   02:57:19  (  68.42, 134.51)    3.08                42
 09/13/2017   03:47:18   ( -68.29, -58.05) 09/13/2017   03:46:50  ( -68.26, -58.05)    3.43                28
 09/15/2017   18:23:03   ( -69.25,  81.80) 09/15/2017   18:24:11  ( -69.12,  83.61)   73.10                68
 09/15/2017   19:13:32   (  68.33,-109.65) 09/15/2017   19:13:50  (  68.34,-109.71)    2.91                18
 09/15/2017   20:04:14   ( -68.24,  57.79) 09/15/2017   20:03:20  ( -68.24,  57.80)    0.49                54
 09/18/2017   10:39:44   ( -68.45,-161.35) 09/18/2017   10:40:52  ( -68.43,-161.37)    2.00                68
 09/18/2017   11:30:28   (  68.33,   6.11) 09/18/2017   11:30:19  (  68.32,   6.13)    1.87                 9
 09/18/2017   12:21:05   ( -67.97, 173.89) 09/18/2017   12:19:52  ( -68.05, 173.45)   20.29                73
 09/21/2017   02:56:40   ( -68.40, -45.52) 09/21/2017   02:57:22  ( -68.42, -45.51)    2.04                42
 09/21/2017   03:47:24   (  68.28, 121.94) 09/21/2017   03:46:49  (  68.30, 121.99)    2.62                35