Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 5 13.  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)
 05/16/2017   02:55:57   ( -68.36, -45.39) 05/16/2017   02:56:57  ( -68.34, -45.45)    2.79                60
 05/16/2017   03:46:41   (  68.23, 122.09) 05/16/2017   03:46:24  (  68.24, 122.07)    1.56                17
 05/16/2017   04:37:13   ( -67.61, -69.82) 05/16/2017   04:36:02  ( -67.68, -70.94)   48.06                71
 05/18/2017   19:12:51   ( -68.33,  70.41) 05/18/2017   19:13:25  ( -68.35,  70.45)    2.61                34
 05/18/2017   20:03:35   (  68.20,-122.11) 05/18/2017   20:02:53  (  68.19,-122.11)    1.89                42
 05/21/2017   10:39:10   (  68.72,  18.36) 05/21/2017   10:40:21  (  68.64,  19.04)   28.77                71
 05/21/2017   11:29:46   ( -68.32,-173.79) 05/21/2017   11:29:55  ( -68.31,-173.73)    2.54                 9
 05/21/2017   12:20:29   (  68.13,  -6.25) 05/21/2017   12:19:23  (  68.14,  -6.29)    1.72                66
 05/24/2017   02:55:59   (  68.38, 134.58) 05/24/2017   02:56:55  (  68.36, 134.58)    1.87                56
 05/24/2017   03:46:40   ( -68.24, -57.93) 05/24/2017   03:46:25  ( -68.26, -57.91)    2.27                15
 05/24/2017   04:37:12   (  67.47, 110.34) 05/24/2017   04:36:03  (  67.53, 108.89)   62.21                69
 05/26/2017   19:12:53   (  68.31,-109.56) 05/26/2017   19:13:25  (  68.31,-109.60)    1.54                32
 05/26/2017   20:03:35   ( -68.23,  57.87) 05/26/2017   20:02:55  ( -68.22,  57.92)    2.56                40