Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 12 24.  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)
 12/25/2016   18:22:55   (  68.43, -97.15) 12/25/2016   18:24:00  (  68.42, -97.15)    0.57                65
 12/25/2016   19:13:37   ( -68.34,  70.29) 12/25/2016   19:13:30  ( -68.32,  70.36)    3.49                 7
 12/25/2016   20:04:14   (  67.84,-121.78) 12/25/2016   20:03:02  (  67.92,-122.46)   30.07                72
 12/28/2016   10:39:49   (  68.41,  18.65) 12/28/2016   10:40:29  (  68.39,  18.69)    2.65                40
 12/28/2016   11:30:30   ( -68.26,-173.84) 12/28/2016   11:29:59  ( -68.29,-173.80)    2.99                31
 12/31/2016   02:06:12   ( -69.20, -33.95) 12/31/2016   02:07:20  ( -69.08, -32.21)   70.05                68
 12/31/2016   02:56:42   (  68.34, 134.52) 12/31/2016   02:56:58  (  68.35, 134.53)    1.97                16
 12/31/2016   03:47:23   ( -68.19, -57.98) 12/31/2016   03:46:29  ( -68.19, -58.03)    2.14                54
 01/02/2017   18:22:51   ( -68.44,  82.85) 01/02/2017   18:23:59  ( -68.43,  82.86)    0.44                68
 01/02/2017   19:13:35   (  68.32,-109.69) 01/02/2017   19:13:26  (  68.32,-109.63)    2.50                 9
 01/02/2017   20:04:12   ( -67.96,  58.08) 01/02/2017   20:02:59  ( -68.05,  57.68)   19.52                73
 01/05/2017   10:39:44   ( -68.37,-161.29) 01/05/2017   10:40:28  ( -68.39,-161.31)    2.91                44
 01/05/2017   11:30:28   (  68.26,   6.16) 01/05/2017   11:29:55  (  68.28,   6.20)    2.75                33