Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 4 18.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2017   06:08:09   ( -70.83, -94.80) 04/20/2017   06:07:00  ( -70.92, -96.72)   70.62                69
 04/20/2017   06:57:47   (  70.13,  71.80) 04/20/2017   06:57:31  (  70.13,  71.85)    1.80                16
 04/20/2017   07:47:17   ( -70.01,-120.72) 04/20/2017   07:48:13  ( -70.03,-120.68)    2.73                56
 04/22/2017   22:24:47   ( -70.25,  20.21) 04/22/2017   22:23:43  ( -70.25,  20.13)    3.01                64
 04/22/2017   23:14:15   (  70.09,-172.37) 04/22/2017   23:14:26  (  70.09,-172.32)    2.20                11
 04/23/2017   00:03:51   ( -69.65,  -5.35) 04/23/2017   00:05:01  ( -69.62,  -4.29)   40.98                70
 04/25/2017   14:41:15   ( -70.21, 136.03) 04/25/2017   14:40:38  ( -70.21, 135.97)    2.54                37
 04/25/2017   15:30:43   (  70.04, -56.56) 04/25/2017   15:31:21  (  70.05, -56.49)    2.87                38
 04/28/2017   06:08:07   (  70.54,  84.77) 04/28/2017   06:06:56  (  70.59,  83.81)   35.74                71
 04/28/2017   06:57:42   ( -70.16,-108.15) 04/28/2017   06:57:32  ( -70.17,-108.21)    2.20                10
 04/28/2017   07:47:09   (  70.05,  59.33) 04/28/2017   07:48:16  (  70.07,  59.26)    3.59                67
 04/30/2017   22:24:40   (  70.21,-159.83) 04/30/2017   22:23:44  (  70.19,-159.78)    3.25                56
 04/30/2017   23:14:10   ( -70.11,   7.66) 04/30/2017   23:14:27  ( -70.13,   7.62)    3.03                17
 05/01/2017   00:03:50   (  69.28, 174.16) 05/01/2017   00:04:57  (  69.29, 176.17)   78.96                67