Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 9 23.  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)
 09/24/2021   22:25:45   ( -70.11,  20.12) 09/24/2021   22:24:45  ( -70.09,  20.15)    2.08                60
 09/24/2021   23:15:12   (  70.01,-172.38) 09/24/2021   23:15:29  (  69.98,-172.37)    2.86                17
 09/25/2021   00:04:52   ( -69.34,  -5.66) 09/25/2021   00:06:01  ( -69.36,  -4.13)   59.76                69
 09/27/2021   14:42:15   ( -70.06, 135.93) 09/27/2021   14:41:41  ( -70.09, 135.93)    3.14                34
 09/27/2021   15:31:42   (  69.96, -56.57) 09/27/2021   15:32:25  (  69.98, -56.60)    2.85                43
 09/30/2021   06:09:10   (  70.34,  84.58) 09/30/2021   06:07:58  (  70.40,  83.90)   26.47                72
 09/30/2021   06:58:44   ( -70.01,-108.26) 09/30/2021   06:58:35  ( -70.04,-108.22)    3.32                 9
 09/30/2021   07:48:11   (  69.90,  59.24) 09/30/2021   07:49:19  (  69.93,  59.25)    3.16                68
 10/02/2021   22:25:43   (  70.11,-159.86) 10/02/2021   22:24:48  (  70.09,-159.85)    2.71                55
 10/02/2021   23:15:13   ( -70.01,   7.62) 10/02/2021   23:15:30  ( -69.98,   7.63)    2.57                17
 10/03/2021   00:04:54   (  69.12, 174.07) 10/03/2021   00:06:00  (  69.14, 176.17)   83.32                66
 10/05/2021   14:42:13   (  70.05, -44.07) 10/05/2021   14:41:43  (  70.05, -44.00)    2.67                30
 10/05/2021   15:31:43   ( -69.94, 123.41) 10/05/2021   15:32:25  ( -69.94, 123.48)    2.65                42