Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2016 12 22.  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)
 12/23/2016   02:06:13   (  69.05, 146.25) 12/23/2016   02:07:22  (  69.00, 147.69)   57.66                69
 12/23/2016   02:56:43   ( -68.32, -45.46) 12/23/2016   02:57:02  ( -68.33, -45.51)    2.74                19
 12/23/2016   03:47:27   (  68.20, 122.00) 12/23/2016   03:46:29  (  68.22, 122.01)    2.20                58
 12/25/2016   18:22:55   (  68.44, -97.16) 12/25/2016   18:23:59  (  68.46, -97.10)    3.25                64
 12/25/2016   19:13:36   ( -68.29,  70.35) 12/25/2016   19:13:30  ( -68.30,  70.33)    0.75                 6
 12/25/2016   20:04:14   (  67.86,-121.79) 12/25/2016   20:03:02  (  67.91,-122.48)   29.42                72
 12/28/2016   10:39:48   (  68.37,  18.70) 12/28/2016   10:40:29  (  68.37,  18.66)    1.73                41
 12/28/2016   11:30:30   ( -68.27,-173.86) 12/28/2016   11:29:59  ( -68.26,-173.83)    1.81                31
 12/31/2016   02:06:11   ( -69.16, -33.89) 12/31/2016   02:07:20  ( -69.05, -32.25)   66.18                69
 12/31/2016   02:56:42   (  68.35, 134.50) 12/31/2016   02:56:58  (  68.32, 134.49)    3.52                16
 12/31/2016   03:47:23   ( -68.20, -57.99) 12/31/2016   03:46:28  ( -68.22, -58.00)    1.66                55
 01/02/2017   18:22:52   ( -68.45,  82.83) 01/02/2017   18:23:59  ( -68.45,  82.88)    1.81                67
 01/02/2017   19:13:35   (  68.29,-109.65) 01/02/2017   19:13:27  (  68.27,-109.69)    2.20                 8
 01/02/2017   20:04:13   ( -67.97,  58.07) 01/02/2017   20:03:00  ( -68.00,  57.63)   18.58                73