Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 4 19.  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   ( -70.85, -94.77) 04/20/2017   06:07:00  ( -70.90, -96.69)   70.08                69
 04/20/2017   06:57:47   (  70.15,  71.84) 04/20/2017   06:57:32  (  70.16,  71.80)    2.18                15
 04/20/2017   07:47:17   ( -70.03,-120.69) 04/20/2017   07:48:13  ( -70.01,-120.65)    2.81                56
 04/22/2017   22:24:48   ( -70.21,  20.16) 04/22/2017   22:23:43  ( -70.23,  20.16)    1.47                65
 04/22/2017   23:14:15   (  70.11,-172.34) 04/22/2017   23:14:27  (  70.12,-172.37)    1.74                12
 04/23/2017   00:03:50   ( -69.67,  -5.32) 04/23/2017   00:05:01  ( -69.65,  -4.34)   37.90                71
 04/25/2017   14:41:15   ( -70.17, 135.98) 04/25/2017   14:40:37  ( -70.19, 136.00)    1.57                38
 04/25/2017   15:30:42   (  70.06, -56.53) 04/25/2017   15:31:21  (  70.08, -56.54)    2.17                39
 04/28/2017   06:08:08   (  70.51,  84.72) 04/28/2017   06:06:56  (  70.57,  83.85)   33.00                72
 04/28/2017   06:57:43   ( -70.13,-108.20) 04/28/2017   06:57:32  ( -70.15,-108.18)    2.59                11
 04/28/2017   07:47:10   (  70.01,  59.28) 04/28/2017   07:48:16  (  70.05,  59.29)    3.60                66
 04/30/2017   22:24:40   (  70.23,-159.80) 04/30/2017   22:23:45  (  70.22,-159.83)    1.99                55
 04/30/2017   23:14:10   ( -70.13,   7.68) 04/30/2017   23:14:27  ( -70.11,   7.65)    2.39                17
 05/01/2017   00:03:50   (  69.30, 174.19) 05/01/2017   00:04:57  (  69.27, 176.20)   79.08                67
 05/03/2017   14:41:08   (  70.18, -44.00) 05/03/2017   14:40:40  (  70.19, -44.02)    1.54                28
 05/03/2017   15:30:38   ( -70.08, 123.49) 05/03/2017   15:31:22  ( -70.08, 123.46)    1.14                44