Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 5.  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)
 05/06/2021   14:41:23   ( -70.19, 136.00) 05/06/2021   14:40:10  ( -70.21, 135.99)    1.88                73
 05/06/2021   15:30:50   (  70.09, -56.50) 05/06/2021   15:30:54  (  70.09, -56.51)    0.38                 4
 05/06/2021   16:20:21   ( -69.92, 110.89) 05/06/2021   16:21:34  ( -69.89, 111.10)    8.35                73
 05/09/2021   06:57:51   ( -70.15,-108.19) 05/09/2021   06:57:06  ( -70.13,-108.12)    3.33                45
 05/09/2021   07:47:18   (  70.04,  59.31) 05/09/2021   07:47:51  (  70.06,  59.29)    2.89                33
 05/11/2021   22:24:41   (  70.64,-159.21) 05/11/2021   22:23:31  (  70.72,-160.62)   52.59                70
 05/11/2021   23:14:19   ( -70.10,   7.62) 05/11/2021   23:14:03  ( -70.10,   7.68)    2.44                16
 05/12/2021   00:03:46   (  69.99, 175.11) 05/12/2021   00:04:47  (  69.99, 175.16)    1.99                61
 05/14/2021   14:41:15   (  70.20, -43.98) 05/14/2021   14:40:17  (  70.18, -43.99)    2.74                58
 05/14/2021   15:30:45   ( -70.10, 123.50) 05/14/2021   15:30:59  ( -70.08, 123.48)    2.33                14
 05/14/2021   16:20:24   (  69.32, -69.91) 05/14/2021   16:21:31  (  69.33, -68.11)   70.75                67
 05/17/2021   06:57:43   (  70.14,  71.82) 05/17/2021   06:57:14  (  70.16,  71.80)    2.13                29
 05/17/2021   07:47:13   ( -70.04,-120.70) 05/17/2021   07:47:56  ( -70.06,-120.72)    2.03                43