Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 3 29.  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)
 03/29/2018   11:29:44   (  68.30,   6.21) 03/29/2018   11:30:17  (  68.32,   6.25)    2.47                33
 03/29/2018   12:20:25   ( -68.16, 173.70) 03/29/2018   12:19:48  ( -68.16, 173.69)    0.45                37
 04/01/2018   02:56:06   ( -68.95, -46.19) 04/01/2018   02:57:15  ( -68.85, -44.88)   53.75                69
 04/01/2018   03:46:39   (  68.24, 122.06) 04/01/2018   03:46:51  (  68.24, 122.01)    1.89                12
 04/01/2018   04:37:21   ( -68.15, -70.51) 04/01/2018   04:36:21  ( -68.14, -70.47)    2.48                60
 04/03/2018   19:12:50   ( -68.35,  70.37) 04/03/2018   19:13:55  ( -68.38,  70.41)    3.24                65
 04/03/2018   20:03:34   (  68.24,-122.17) 04/03/2018   20:03:23  (  68.21,-122.15)    3.23                11
 04/03/2018   20:54:10   ( -67.82,  45.67) 04/03/2018   20:52:57  ( -67.89,  45.10)   24.90                73
 04/06/2018   11:29:45   ( -68.29,-173.78) 04/06/2018   11:30:29  ( -68.30,-173.83)    1.92                44
 04/06/2018   12:20:29   (  68.18,  -6.33) 04/06/2018   12:19:56  (  68.18,  -6.32)    0.36                33
 04/09/2018   02:56:12   (  69.09, 133.61) 04/09/2018   02:57:21  (  68.98, 135.25)   66.37                69
 04/09/2018   03:46:41   ( -68.29, -58.01) 04/09/2018   03:47:02  ( -68.27, -57.99)    1.80                21
 04/09/2018   04:37:24   (  68.12, 109.51) 04/09/2018   04:36:29  (  68.15, 109.51)    3.32                55
 04/11/2018   19:12:54   (  68.34,-109.62) 04/11/2018   19:14:05  (  68.34,-109.68)    2.52                71
 04/11/2018   20:03:36   ( -68.23,  57.83) 04/11/2018   20:03:35  ( -68.25,  57.84)    1.77                 1
 04/11/2018   20:54:17   (  67.96,-134.52) 04/11/2018   20:53:04  (  68.02,-134.79)   12.59                73