Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 7 20.  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)
 07/22/2017   14:41:47   (  70.15, -43.92) 07/22/2017   14:40:35  (  70.15, -43.89)    0.91                72
 07/22/2017   15:31:17   ( -70.04, 123.56) 07/22/2017   15:31:17  ( -70.06, 123.57)    1.75                 0
 07/22/2017   16:20:46   (  69.83, -69.10) 07/22/2017   16:21:58  (  69.78, -68.71)   15.64                72
 07/25/2017   06:58:18   (  70.12,  71.91) 07/25/2017   06:57:32  (  70.11,  71.93)    1.01                46
 07/25/2017   07:47:48   ( -70.01,-120.61) 07/25/2017   07:48:14  ( -70.01,-120.60)    0.16                26
 07/27/2017   22:25:07   ( -70.96,  21.39) 07/27/2017   22:24:00  ( -71.02,  18.93)   89.58                67
 07/27/2017   23:14:48   (  70.08,-172.26) 07/27/2017   23:14:28  (  70.07,-172.25)    1.14                20
 07/28/2017   00:04:18   ( -69.98,  -4.77) 07/28/2017   00:05:10  ( -69.97,  -4.77)    1.17                52
 07/30/2017   14:41:52   ( -70.16, 136.08) 07/30/2017   14:40:41  ( -70.14, 136.11)    2.55                71
 07/30/2017   15:31:19   (  70.04, -56.44) 07/30/2017   15:31:25  (  70.04, -56.43)    0.91                 6
 07/30/2017   16:20:52   ( -69.78, 110.82) 07/30/2017   16:22:04  ( -69.77, 111.29)   17.97                72
 08/02/2017   06:58:23   ( -70.12,-108.10) 08/02/2017   06:57:38  ( -70.10,-108.07)    2.67                45
 08/02/2017   07:47:50   (  70.00,  59.38) 08/02/2017   07:48:22  (  70.00,  59.39)    0.60                32