Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NOAA-19
TLE Epoch: 2021 4 18.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2021   01:33:06   (  80.33,-173.13) 04/19/2021   01:33:14  (  80.32,-173.04)    2.22                 8
 04/21/2021   07:06:49   ( -80.35, -76.43) 04/21/2021   07:06:28  ( -80.33, -76.36)    2.70                21
 04/21/2021   07:56:16   (  80.32,  90.91) 04/21/2021   07:57:26  (  80.33,  90.91)    1.13                70
 04/23/2021   12:40:31   (  80.36,  20.25) 04/23/2021   12:39:38  (  80.34,  20.20)    2.42                53
 04/23/2021   13:29:59   ( -80.33,-172.39) 04/23/2021   13:30:39  ( -80.32,-172.26)    2.53                40
 04/25/2021   19:03:41   (  80.34, -75.75) 04/25/2021   19:03:50  (  80.35, -75.88)    2.70                 9
 04/28/2021   00:37:24   ( -80.35,  20.95) 04/28/2021   00:37:02  ( -80.35,  20.90)    1.09                22
 04/28/2021   01:26:51   (  80.32,-171.76) 04/28/2021   01:28:01  (  80.34,-171.65)    3.11                70
 04/30/2021   06:11:06   (  80.35, 117.53) 04/30/2021   06:10:13  (  80.35, 117.60)    1.28                53