Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 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)
 12/15/2018   18:22:48   (  68.48, -97.20) 12/15/2018   18:23:59  (  68.43, -97.09)    6.85                71
 12/15/2018   19:13:28   ( -68.29,  70.37) 12/15/2018   19:13:30  ( -68.26,  70.33)    3.17                 2
 12/15/2018   20:04:11   (  68.11,-122.10) 12/15/2018   20:02:58  (  68.10,-122.21)    4.91                73
 12/18/2018   10:39:41   (  68.39,  18.70) 12/18/2018   10:40:29  (  68.38,  18.73)    1.14                48
 12/18/2018   11:30:22   ( -68.24,-173.80) 12/18/2018   11:30:00  ( -68.22,-173.84)    3.09                22
 12/18/2018   12:20:49   (  67.20,  -5.22) 12/18/2018   12:19:42  (  67.27,  -7.28)   88.97                67
 12/21/2018   02:06:09   ( -69.42, -34.25) 12/21/2018   02:07:16  ( -69.32, -31.86)   94.06                67
 12/21/2018   02:56:35   (  68.34, 134.52) 12/21/2018   02:56:59  (  68.32, 134.53)    2.87                24
 12/21/2018   03:47:16   ( -68.20, -57.97) 12/21/2018   03:46:29  ( -68.21, -57.97)    1.77                47
 12/23/2018   18:22:47   ( -68.58,  82.68) 12/23/2018   18:23:58  ( -68.52,  83.01)   14.77                71
 12/23/2018   19:13:28   (  68.31,-109.66) 12/23/2018   19:13:27  (  68.29,-109.62)    2.16                 1
 12/23/2018   20:04:09   ( -68.15,  57.85) 12/23/2018   20:02:58  ( -68.13,  57.82)    2.56                71
 12/26/2018   10:39:38   ( -68.38,-161.29) 12/26/2018   10:40:29  ( -68.37,-161.29)    0.71                51
 12/26/2018   11:30:22   (  68.27,   6.16) 12/26/2018   11:29:56  (  68.25,   6.21)    3.09                26
 12/26/2018   12:20:48   ( -67.30, 174.66) 12/26/2018   12:19:40  ( -67.37, 172.83)   78.67                68
 12/29/2018   02:06:07   (  69.35, 145.84) 12/29/2018   02:07:13  (  69.25, 148.06)   88.32                66
 12/29/2018   02:56:32   ( -68.34, -45.47) 12/29/2018   02:56:58  ( -68.31, -45.47)    2.68                26
 12/29/2018   03:47:15   (  68.18, 122.04) 12/29/2018   03:46:25  (  68.19, 122.03)    1.29                50