Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 25.  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)
 07/25/2021   14:41:56   ( -70.08, 135.98) 07/25/2021   14:41:09  ( -70.11, 135.96)    3.36                47
 07/25/2021   15:31:23   (  69.98, -56.52) 07/25/2021   15:31:53  (  69.99, -56.54)    0.92                30
 07/28/2021   06:08:45   (  70.82,  85.31) 07/28/2021   06:07:37  (  70.87,  83.18)   77.97                68
 07/28/2021   06:58:27   ( -70.06,-108.18) 07/28/2021   06:58:05  ( -70.06,-108.19)    0.37                22
 07/28/2021   07:47:54   (  69.95,  59.31) 07/28/2021   07:48:49  (  69.93,  59.31)    2.19                55
 07/30/2021   22:25:28   (  70.13,-159.84) 07/30/2021   22:24:20  (  70.14,-159.87)    1.77                68
 07/30/2021   23:14:58   ( -70.02,   7.65) 07/30/2021   23:15:01  ( -70.00,   7.66)    2.75                 3
 07/31/2021   00:04:30   (  69.64, 174.76) 07/31/2021   00:05:41  (  69.66, 175.47)   27.63                71
 08/02/2021   14:41:59   (  70.08, -44.02) 08/02/2021   14:41:16  (  70.09, -44.02)    0.20                43
 08/02/2021   15:31:29   ( -69.99, 123.47) 08/02/2021   15:31:58  ( -70.00, 123.43)    2.09                29
 08/05/2021   06:08:49   ( -70.86, -94.63) 08/05/2021   06:07:41  ( -70.88, -96.84)   80.56                68
 08/05/2021   06:58:29   (  70.04,  71.79) 08/05/2021   06:58:11  (  70.03,  71.82)    1.13                18
 08/05/2021   07:47:59   ( -69.94,-120.71) 08/05/2021   07:48:53  ( -69.94,-120.72)    0.50                54
 08/07/2021   22:25:33   ( -70.10,  20.12) 08/07/2021   22:24:23  ( -70.10,  20.18)    2.45                70
 08/07/2021   23:15:00   (  69.98,-172.40) 08/07/2021   23:15:07  (  69.98,-172.33)    2.49                 7
 08/08/2021   00:04:34   ( -69.67,  -5.20) 08/08/2021   00:05:45  ( -69.68,  -4.56)   24.77                71