Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 13.  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)
 07/14/2021   22:25:20   (  70.10,-159.86) 07/14/2021   22:24:08  (  70.10,-159.79)    2.91                72
 07/14/2021   23:14:49   ( -70.04,   7.69) 07/14/2021   23:14:50  ( -70.02,   7.66)    2.99                 1
 07/15/2021   00:04:19   (  69.78, 174.96) 07/15/2021   00:05:31  (  69.73, 175.39)   17.38                72
 07/17/2021   14:41:49   (  70.10, -43.98) 07/17/2021   14:41:05  (  70.10, -44.01)    1.37                44
 07/17/2021   15:31:19   ( -69.99, 123.50) 07/17/2021   15:31:47  ( -70.01, 123.44)    3.00                28
 07/20/2021   06:08:39   ( -70.86, -94.61) 07/20/2021   06:07:31  ( -70.89, -96.83)   80.82                68
 07/20/2021   06:58:19   (  70.04,  71.82) 07/20/2021   06:58:01  (  70.04,  71.84)    0.66                18
 07/20/2021   07:47:49   ( -69.94,-120.69) 07/20/2021   07:48:43  ( -69.95,-120.71)    1.69                54
 07/22/2021   22:25:21   ( -70.09,  20.13) 07/22/2021   22:24:12  ( -70.11,  20.20)    2.75                69
 07/22/2021   23:14:48   (  69.98,-172.38) 07/22/2021   23:14:56  (  69.99,-172.32)    2.71                 8
 07/23/2021   00:04:22   ( -69.66,  -5.19) 07/23/2021   00:05:33  ( -69.63,  -4.47)   28.19                71
 07/25/2021   14:41:50   ( -70.09, 136.01) 07/25/2021   14:41:09  ( -70.11, 135.96)    2.96                41
 07/25/2021   15:31:17   (  69.97, -56.51) 07/25/2021   15:31:53  (  69.99, -56.56)    3.22                36