Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 22.  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)
 07/22/2021   22:25:26   ( -70.10,  20.12) 07/22/2021   22:24:13  ( -70.12,  20.17)    3.24                73
 07/22/2021   23:14:53   (  70.00,-172.37) 07/22/2021   23:14:57  (  70.00,-172.33)    1.87                 4
 07/23/2021   00:04:24   ( -69.83,  -4.97) 07/23/2021   00:05:37  ( -69.81,  -4.73)    9.71                73
 07/25/2021   14:41:57   ( -70.08, 135.97) 07/25/2021   14:41:09  ( -70.07, 136.03)    2.50                48
 07/25/2021   15:31:24   (  69.97, -56.53) 07/25/2021   15:31:54  (  69.99, -56.55)    2.46                30
 07/28/2021   06:08:45   (  70.81,  85.30) 07/28/2021   06:07:37  (  70.88,  83.17)   78.12                68
 07/28/2021   06:58:27   ( -70.05,-108.19) 07/28/2021   06:58:05  ( -70.06,-108.20)    1.29                22
 07/28/2021   07:47:54   (  69.94,  59.30) 07/28/2021   07:48:49  (  69.94,  59.29)    0.33                55
 07/30/2021   22:25:28   (  70.12,-159.85) 07/30/2021   22:24:19  (  70.09,-159.80)    3.29                69
 07/30/2021   23:14:58   ( -70.02,   7.64) 07/30/2021   23:15:01  ( -70.01,   7.65)    1.46                 3
 07/31/2021   00:04:30   (  69.63, 174.75) 07/31/2021   00:05:41  (  69.67, 175.46)   27.87                71
 08/02/2021   14:41:59   (  70.08, -44.03) 08/02/2021   14:41:16  (  70.09, -44.04)    1.85                43
 08/02/2021   15:31:29   ( -69.98, 123.47) 08/02/2021   15:31:58  ( -70.00, 123.42)    3.05                29
 08/05/2021   06:08:50   ( -70.86, -94.63) 08/05/2021   06:07:42  ( -70.89, -96.85)   80.80                68
 08/05/2021   06:58:30   (  70.03,  71.79) 08/05/2021   06:58:12  (  70.04,  71.81)    1.45                18
 08/05/2021   07:47:59   ( -69.94,-120.71) 08/05/2021   07:48:53  ( -69.95,-120.73)    1.39                54