Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 4 15.  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)
 04/16/2017   19:12:47   ( -68.31,  70.45) 04/16/2017   19:13:22  ( -68.32,  70.41)    1.90                35
 04/16/2017   20:03:31   (  68.20,-122.09) 04/16/2017   20:02:49  (  68.21,-122.07)    1.83                42
 04/19/2017   10:39:08   (  68.84,  18.20) 04/19/2017   10:40:18  (  68.74,  19.15)   40.00                70
 04/19/2017   11:29:42   ( -68.32,-173.78) 04/19/2017   11:29:54  ( -68.30,-173.75)    2.24                12
 04/19/2017   12:20:25   (  68.15,  -6.26) 04/19/2017   12:19:22  (  68.14,  -6.30)    2.28                63
 04/22/2017   02:55:55   (  68.37, 134.60) 04/22/2017   02:56:59  (  68.36, 134.54)    2.75                64
 04/22/2017   03:46:37   ( -68.27, -57.95) 04/22/2017   03:46:29  ( -68.26, -57.94)    1.41                 8
 04/22/2017   04:37:13   (  67.73, 110.04) 04/22/2017   04:36:02  (  67.81, 109.18)   37.29                71
 04/24/2017   19:12:50   (  68.33,-109.57) 04/24/2017   19:13:35  (  68.34,-109.62)    2.67                45
 04/24/2017   20:03:32   ( -68.22,  57.87) 04/24/2017   20:03:05  ( -68.24,  57.89)    2.33                27
 04/27/2017   11:29:46   (  68.34,   6.18) 04/27/2017   11:30:12  (  68.36,   6.24)    3.16                26
 04/27/2017   12:20:27   ( -68.18, 173.70) 04/27/2017   12:19:43  ( -68.21, 173.69)    2.72                44