Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2017 9 23.  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)
 09/23/2017   18:23:02   (  68.87, -97.69) 09/23/2017   18:24:12  (  68.76, -96.83)   36.62                70
 09/23/2017   19:13:36   ( -68.36,  70.30) 09/23/2017   19:13:47  ( -68.37,  70.33)    1.66                11
 09/23/2017   20:04:20   (  68.23,-122.22) 09/23/2017   20:03:15  (  68.21,-122.23)    2.48                65
 09/26/2017   10:39:50   (  68.45,  18.63) 09/26/2017   10:40:45  (  68.46,  18.68)    2.23                55
 09/26/2017   11:30:31   ( -68.32,-173.88) 09/26/2017   11:30:16  ( -68.30,-173.88)    2.00                15
 09/26/2017   12:21:03   (  67.54,  -5.59) 09/26/2017   12:19:54  (  67.57,  -7.08)   63.36                69
 09/29/2017   02:56:46   (  68.41, 134.45) 09/29/2017   02:57:15  (  68.39, 134.48)    2.15                29
 09/29/2017   03:47:27   ( -68.28, -58.05) 09/29/2017   03:46:45  ( -68.29, -58.01)    2.35                42
 10/01/2017   18:23:03   ( -68.77,  82.44) 10/01/2017   18:24:14  ( -68.68,  83.05)   26.88                71
 10/01/2017   19:13:41   (  68.32,-109.66) 10/01/2017   19:13:45  (  68.33,-109.72)    2.89                 4
 10/01/2017   20:04:23   ( -68.24,  57.76) 10/01/2017   20:03:15  ( -68.24,  57.80)    1.36                68
 10/04/2017   10:39:54   ( -68.47,-161.39) 10/04/2017   10:40:47  ( -68.46,-161.34)    2.20                53
 10/04/2017   11:30:37   (  68.29,   6.16) 10/04/2017   11:30:15  (  68.28,   6.09)    2.58                22
 10/04/2017   12:21:06   ( -67.50, 174.45) 10/04/2017   12:19:57  ( -67.51, 172.84)   68.42                69
 10/07/2017   02:06:25   (  69.48, 145.67) 10/07/2017   02:07:31  (  69.34, 148.03)   93.32                66
 10/07/2017   02:56:49   ( -68.43, -45.57) 10/07/2017   02:57:16  ( -68.41, -45.52)    3.00                27
 10/07/2017   03:47:32   (  68.25, 121.97) 10/07/2017   03:46:44  (  68.23, 121.91)    2.82                48