Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 8 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)
 08/26/2021   14:42:07   ( -70.10, 136.00) 08/26/2021   14:41:27  ( -70.08, 135.97)    3.19                40
 08/26/2021   15:31:35   (  69.94, -56.58) 08/26/2021   15:32:11  (  69.95, -56.54)    2.14                36
 08/29/2021   06:09:00   (  70.57,  84.93) 08/29/2021   06:07:50  (  70.61,  83.58)   49.93                70
 08/29/2021   06:58:38   ( -70.03,-108.23) 08/29/2021   06:58:23  ( -70.04,-108.21)    1.95                15
 08/29/2021   07:48:05   (  69.92,  59.26) 08/29/2021   07:49:07  (  69.92,  59.27)    0.78                62
 08/31/2021   22:25:38   (  70.11,-159.87) 08/31/2021   22:24:37  (  70.11,-159.86)    0.38                61
 08/31/2021   23:15:08   ( -70.00,   7.62) 08/31/2021   23:15:19  ( -70.01,   7.60)    1.54                11
 09/01/2021   00:04:44   (  69.39, 174.43) 09/01/2021   00:05:53  (  69.37, 175.86)   56.12                69
 09/03/2021   14:42:08   (  70.07, -44.03) 09/03/2021   14:41:33  (  70.09, -44.06)    1.51                35
 09/03/2021   15:31:38   ( -69.97, 123.46) 09/03/2021   15:32:15  ( -69.99, 123.41)    2.50                37
 09/06/2021   06:09:03   ( -70.54, -95.12) 09/06/2021   06:07:52  ( -70.59, -96.39)   47.35                71
 09/06/2021   06:58:37   (  70.04,  71.80) 09/06/2021   06:58:27  (  70.01,  71.82)    3.12                10
 09/06/2021   07:48:07   ( -69.94,-120.71) 09/06/2021   07:49:09  ( -69.91,-120.71)    3.19                62