Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 05/19/2023   23:00:51   (  70.16,-169.22) 05/19/2023   23:02:03  (  70.16,-169.19)    1.06                72
 05/19/2023   23:51:32   ( -70.03,  -1.69) 05/19/2023   23:51:33  ( -70.04,  -1.72)    1.76                 1
 05/20/2023   00:42:14   (  69.79, 165.96) 05/20/2023   00:41:02  (  69.83, 165.62)   13.47                72
 05/22/2023   15:17:46   (  70.11, -53.38) 05/22/2023   15:18:30  (  70.13, -53.34)    2.57                44
 05/22/2023   16:08:28   ( -70.03, 114.07) 05/22/2023   16:08:00  ( -70.02, 114.13)    2.60                28
 05/25/2023   06:44:11   ( -70.92,-106.22) 05/25/2023   06:45:19  ( -70.80,-104.12)   77.58                68
 05/25/2023   07:34:41   (  70.07,  62.45) 05/25/2023   07:34:57  (  70.09,  62.48)    2.18                16
 05/25/2023   08:25:23   ( -69.98,-130.10) 05/25/2023   08:24:27  ( -69.98,-130.04)    2.22                56
 05/27/2023   23:00:51   ( -70.15,  10.78) 05/27/2023   23:01:56  ( -70.13,  10.78)    1.69                65
 05/27/2023   23:51:35   (  70.03, 178.27) 05/27/2023   23:51:23  (  70.02, 178.27)    1.45                12
 05/28/2023   00:42:10   ( -69.57, -13.73) 05/28/2023   00:40:58  ( -69.64, -14.62)   35.40                72
 05/30/2023   15:17:46   ( -70.12, 126.60) 05/30/2023   15:18:22  ( -70.11, 126.63)    1.71                36
 05/30/2023   16:08:30   (  70.01, -65.92) 05/30/2023   16:07:49  (  69.99, -65.89)    2.18                41