Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2018   08:50:29   (  81.31, -21.31) (  81.31, -21.31)    0.07                 1
 07/19/2018   03:07:55   (  81.31,  64.32) (  81.31,  64.33)    0.07                 1
 07/19/2018   16:39:54   (  81.31,-138.66) (  81.31,-138.65)    0.07                 1
 07/21/2018   10:57:20   (  81.31, -53.03) (  81.31, -53.02)    0.07                 1
 07/22/2018   00:29:19   (  81.31, 103.99) (  81.31, 103.99)    0.07                 1
 07/23/2018   03:33:17   (  81.31,  58.02) (  81.31,  58.02)    0.07                 1
 07/24/2018   21:50:43   (  81.31, 143.63) (  81.31, 143.63)    0.07                 1
 07/25/2018   11:22:41   (  81.31, -59.36) (  81.31, -59.36)    0.07                 1
 07/26/2018   14:26:39   (  81.31,-105.34) (  81.31,-105.34)    0.07                 1
 07/27/2018   17:30:36   (  81.31,-151.32) (  81.31,-151.32)    0.07                 1
 07/28/2018   20:34:34   (  81.31, 162.69) (  81.31, 162.69)    0.07                 1
 07/29/2018   23:38:31   (  81.31, 116.70) (  81.31, 116.70)    0.07                 1