Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 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)
 04/23/2021   06:58:01   ( -70.16,-108.17) 04/23/2021   06:57:01  ( -70.14,-108.12)    3.15                60
 04/23/2021   07:47:28   (  70.05,  59.33) 04/23/2021   07:47:46  (  70.07,  59.30)    1.85                18
 04/23/2021   08:37:08   ( -69.39,-133.94) 04/23/2021   08:38:17  ( -69.40,-132.40)   60.23                69
 04/25/2021   23:14:29   ( -70.14,   7.68) 04/25/2021   23:13:55  ( -70.14,   7.65)    1.59                34
 04/26/2021   00:03:56   (  70.03, 175.17) 04/26/2021   00:04:39  (  70.03, 175.14)    1.40                43
 04/28/2021   14:41:23   (  70.43, -43.64) 04/28/2021   14:40:11  (  70.46, -44.38)   27.70                72
 04/28/2021   15:30:57   ( -70.11, 123.52) 04/28/2021   15:30:48  ( -70.10, 123.49)    1.37                 9
 04/28/2021   16:20:24   (  70.00, -68.99) 04/28/2021   16:21:32  (  69.99, -69.03)    1.66                68
 05/01/2021   06:57:54   (  70.18,  71.87) 05/01/2021   06:56:58  (  70.16,  71.86)    2.18                56
 05/01/2021   07:47:24   ( -70.08,-120.65) 05/01/2021   07:47:40  ( -70.07,-120.67)    1.63                16
 05/01/2021   08:37:04   (  69.24,  45.87) 05/01/2021   08:38:11  (  69.27,  47.81)   76.56                67
 05/03/2021   23:14:22   (  70.14,-172.31) 05/03/2021   23:13:51  (  70.13,-172.31)    1.19                31
 05/04/2021   00:03:52   ( -70.04,  -4.82) 05/04/2021   00:04:33  ( -70.03,  -4.84)    1.26                41