Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 1 16.  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)
 01/16/2018   10:39:21   (  68.39,  18.73) 01/16/2018   10:40:27  (  68.41,  18.78)    3.07                66
 01/16/2018   11:30:02   ( -68.26,-173.78) 01/16/2018   11:29:58  ( -68.25,-173.78)    1.13                 4
 01/16/2018   12:20:41   (  67.86,  -5.97) 01/16/2018   12:19:29  (  67.91,  -6.53)   23.95                72
 01/19/2018   02:56:13   (  68.31, 134.61) 01/19/2018   02:56:57  (  68.34, 134.57)    3.12                44
 01/19/2018   03:46:54   ( -68.23, -57.97) 01/19/2018   03:46:26  ( -68.23, -57.92)    2.09                28
 01/21/2018   18:22:37   ( -69.26,  81.80) 01/21/2018   18:23:45  ( -69.14,  83.82)   80.96                68
 01/21/2018   19:13:05   (  68.29,-109.58) 01/21/2018   19:13:25  (  68.31,-109.58)    1.99                20
 01/21/2018   20:03:46   ( -68.15,  57.91) 01/21/2018   20:02:56  ( -68.15,  57.86)    2.10                50
 01/24/2018   10:39:15   ( -68.44,-161.31) 01/24/2018   10:40:26  ( -68.43,-161.19)    4.97                71
 01/24/2018   11:29:58   (  68.26,   6.23) 01/24/2018   11:29:54  (  68.26,   6.25)    1.02                 4
 01/24/2018   12:20:38   ( -68.07, 173.79) 01/24/2018   12:19:25  ( -68.10, 173.69)    5.06                73
 01/27/2018   02:56:07   ( -68.36, -45.43) 01/27/2018   02:56:55  ( -68.37, -45.38)    2.67                48
 01/27/2018   03:46:50   (  68.19, 122.10) 01/27/2018   03:46:23  (  68.20, 122.06)    2.02                27
 01/27/2018   04:37:16   ( -67.24, -69.43) 01/27/2018   04:36:08  ( -67.26, -71.38)   84.05                68
 01/29/2018   18:22:33   (  69.23, -98.15) 01/29/2018   18:23:41  (  69.13, -96.18)   78.61                68
 01/29/2018   19:12:59   ( -68.29,  70.44) 01/29/2018   19:13:24  ( -68.30,  70.42)    1.65                25
 01/29/2018   20:03:42   (  68.17,-122.10) 01/29/2018   20:02:50  (  68.18,-122.07)    1.90                52