Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 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)
 07/06/2021   22:25:18   ( -70.26,  20.35) 07/06/2021   22:24:05  ( -70.34,  19.86)   20.44                73
 07/06/2021   23:14:48   (  70.00,-172.39) 07/06/2021   23:14:45  (  70.01,-172.32)    3.16                 3
 07/07/2021   00:04:17   ( -69.93,  -4.84) 07/07/2021   00:05:27  ( -69.92,  -4.87)    1.59                70
 07/09/2021   14:41:50   ( -70.11, 136.02) 07/09/2021   14:40:58  ( -70.12, 135.98)    1.50                52
 07/09/2021   15:31:17   (  70.01, -56.48) 07/09/2021   15:31:42  (  70.00, -56.53)    2.12                25
 07/09/2021   16:21:02   ( -69.07, 109.88) 07/09/2021   16:22:08  ( -69.06, 112.15)   89.93                66
 07/12/2021   06:08:35   (  71.00,  85.59) 07/12/2021   06:07:29  (  71.03,  82.95)   95.69                66
 07/12/2021   06:58:20   ( -70.07,-108.16) 07/12/2021   06:57:54  ( -70.05,-108.15)    2.37                26
 07/12/2021   07:47:47   (  69.96,  59.33) 07/12/2021   07:48:38  (  69.93,  59.34)    3.52                51
 07/14/2021   22:25:20   (  70.13,-159.83) 07/14/2021   22:24:09  (  70.13,-159.82)    0.20                71
 07/14/2021   23:14:50   ( -70.02,   7.66) 07/14/2021   23:14:51  ( -70.03,   7.64)    1.38                 1
 07/15/2021   00:04:20   (  69.74, 174.92) 07/15/2021   00:05:32  (  69.76, 175.36)   17.08                72
 07/17/2021   14:41:49   (  70.07, -44.02) 07/17/2021   14:41:04  (  70.06, -43.96)    2.69                45
 07/17/2021   15:31:19   ( -69.97, 123.47) 07/17/2021   15:31:46  ( -69.97, 123.50)    1.44                27