Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 4 6.  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)
 04/07/2018   06:08:10   ( -70.75, -94.91) 04/07/2018   06:07:01  ( -70.80, -96.55)   60.28                69
 04/07/2018   06:57:47   (  70.10,  71.78) 04/07/2018   06:57:34  (  70.11,  71.85)    2.71                13
 04/07/2018   07:47:16   ( -70.04,-120.67) 04/07/2018   07:48:16  ( -70.02,-120.69)    2.82                60
 04/09/2018   22:24:47   ( -70.24,  20.21) 04/09/2018   22:23:46  ( -70.22,  20.14)    3.08                61
 04/09/2018   23:14:15   (  70.08,-172.37) 04/09/2018   23:14:29  (  70.06,-172.30)    3.27                14
 04/10/2018   00:03:53   ( -69.53,  -5.50) 04/10/2018   00:05:03  ( -69.54,  -4.21)   50.21                70
 04/12/2018   14:41:16   ( -70.16, 135.97) 04/12/2018   14:40:41  ( -70.17, 135.99)    1.56                35
 04/12/2018   15:30:43   (  70.05, -56.53) 04/12/2018   15:31:25  (  70.07, -56.55)    1.91                42
 04/15/2018   06:08:10   (  70.40,  84.57) 04/15/2018   06:06:58  (  70.49,  83.93)   25.90                72
 04/15/2018   06:57:43   ( -70.13,-108.19) 04/15/2018   06:57:35  ( -70.12,-108.17)    0.92                 8
 04/15/2018   07:47:10   (  70.02,  59.30) 04/15/2018   07:48:19  (  70.02,  59.29)    0.66                69
 04/17/2018   22:24:41   (  70.20,-159.84) 04/17/2018   22:23:48  (  70.19,-159.82)    1.46                53
 04/17/2018   23:14:11   ( -70.10,   7.64) 04/17/2018   23:14:30  ( -70.08,   7.66)    2.07                19
 04/18/2018   00:03:53   (  69.15, 174.01) 04/18/2018   00:04:59  (  69.19, 176.28)   89.86                66
 04/20/2018   14:41:09   (  70.16, -44.02) 04/20/2018   14:40:43  (  70.15, -43.99)    1.39                26
 04/20/2018   15:30:39   ( -70.06, 123.47) 04/20/2018   15:31:25  ( -70.04, 123.50)    2.55                46