Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 18.  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   10:39:45   ( -68.47,-161.37) 09/18/2017   10:40:49  ( -68.47,-161.31)    2.35                64
 09/18/2017   11:30:28   (  68.28,   6.18) 09/18/2017   11:30:17  (  68.30,   6.13)    2.88                11
 09/18/2017   12:21:03   ( -67.88, 174.00) 09/18/2017   12:19:51  ( -67.92, 173.31)   29.34                72
 09/21/2017   02:56:40   ( -68.42, -45.54) 09/21/2017   02:57:17  ( -68.43, -45.48)    2.87                37
 09/21/2017   03:47:24   (  68.29, 121.94) 09/21/2017   03:46:45  (  68.26, 121.96)    3.25                39
 09/23/2017   18:23:01   (  68.83, -97.64) 09/23/2017   18:24:12  (  68.71, -96.89)   33.07                71
 09/23/2017   19:13:36   ( -68.37,  70.29) 09/23/2017   19:13:46  ( -68.38,  70.34)    2.55                10
 09/23/2017   20:04:19   (  68.19,-122.17) 09/23/2017   20:03:14  (  68.21,-122.22)    3.02                65
 09/26/2017   10:39:50   (  68.41,  18.69) 09/26/2017   10:40:45  (  68.43,  18.64)    2.26                55
 09/26/2017   11:30:32   ( -68.33,-173.89) 09/26/2017   11:30:15  ( -68.32,-173.85)    1.72                17
 09/26/2017   12:21:03   (  67.50,  -5.55) 09/26/2017   12:19:54  (  67.53,  -7.12)   67.02                69
 09/29/2017   02:56:47   (  68.42, 134.44) 09/29/2017   02:57:13  (  68.41, 134.51)    3.28                26
 09/29/2017   03:47:26   ( -68.23, -57.99) 09/29/2017   03:46:43  ( -68.25, -58.05)    3.24                43
 10/01/2017   18:23:00   ( -68.61,  82.65) 10/01/2017   18:24:12  ( -68.56,  82.92)   12.92                72
 10/01/2017   19:13:41   (  68.33,-109.67) 10/01/2017   19:13:41  (  68.32,-109.71)    1.77                 0
 10/01/2017   20:04:23   ( -68.24,  57.76) 10/01/2017   20:03:11  ( -68.22,  57.80)    2.73                72