Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 12 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)
 12/18/2018   10:39:41   (  68.40,  18.68) 12/18/2018   10:40:29  (  68.39,  18.73)    2.01                48
 12/18/2018   11:30:22   ( -68.25,-173.81) 12/18/2018   11:29:59  ( -68.28,-173.77)    3.39                23
 12/18/2018   12:20:49   (  67.21,  -5.23) 12/18/2018   12:19:42  (  67.28,  -7.28)   88.10                67
 12/21/2018   02:06:10   ( -69.48, -34.34) 12/21/2018   02:07:16  ( -69.34, -31.83)   99.19                66
 12/21/2018   02:56:35   (  68.35, 134.51) 12/21/2018   02:56:59  (  68.35, 134.56)    2.26                24
 12/21/2018   03:47:16   ( -68.21, -57.99) 12/21/2018   03:46:30  ( -68.18, -58.01)    2.84                46
 12/23/2018   18:22:48   ( -68.59,  82.66) 12/23/2018   18:24:00  ( -68.52,  83.00)   15.64                72
 12/23/2018   19:13:28   (  68.32,-109.67) 12/23/2018   19:13:28  (  68.30,-109.62)    2.94                 0
 12/23/2018   20:04:09   ( -68.16,  57.84) 12/23/2018   20:02:59  ( -68.13,  57.82)    3.43                70
 12/26/2018   10:39:38   ( -68.39,-161.30) 12/26/2018   10:40:30  ( -68.41,-161.25)    3.18                52
 12/26/2018   11:30:21   (  68.23,   6.21) 12/26/2018   11:29:58  (  68.24,   6.19)    1.75                23
 12/26/2018   12:20:49   ( -67.37, 174.58) 12/26/2018   12:19:40  ( -67.46, 172.93)   71.39                69
 12/29/2018   02:06:08   (  69.42, 145.75) 12/29/2018   02:07:14  (  69.34, 148.17)   95.22                66
 12/29/2018   02:56:32   ( -68.35, -45.49) 12/29/2018   02:57:00  ( -68.34, -45.45)    1.49                28
 12/29/2018   03:47:15   (  68.19, 122.03) 12/29/2018   03:46:28  (  68.17, 121.99)    2.75                47