Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 18.  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)
 07/20/2021   06:08:40   ( -70.96, -94.47) 07/20/2021   06:07:33  ( -71.00, -97.00)   91.98                67
 07/20/2021   06:58:22   (  70.04,  71.81) 07/20/2021   06:58:01  (  70.04,  71.85)    1.65                21
 07/20/2021   07:47:52   ( -69.93,-120.71) 07/20/2021   07:48:43  ( -69.95,-120.71)    2.20                51
 07/22/2021   22:25:25   ( -70.13,  20.17) 07/22/2021   22:24:13  ( -70.16,  20.12)    2.96                72
 07/22/2021   23:14:52   (  70.03,-172.33) 07/22/2021   23:14:57  (  70.03,-172.38)    1.91                 5
 07/23/2021   00:04:24   ( -69.81,  -5.00) 07/23/2021   00:05:36  ( -69.79,  -4.70)   12.00                72
 07/25/2021   14:41:57   ( -70.07, 135.96) 07/25/2021   14:41:09  ( -70.10, 135.97)    3.38                48
 07/25/2021   15:31:24   (  69.96, -56.55) 07/25/2021   15:31:53  (  69.98, -56.54)    2.48                29
 07/28/2021   06:08:45   (  70.87,  85.39) 07/28/2021   06:07:38  (  70.93,  83.10)   83.60                67
 07/28/2021   06:58:28   ( -70.06,-108.18) 07/28/2021   06:58:05  ( -70.05,-108.18)    1.42                23
 07/28/2021   07:47:55   (  69.95,  59.30) 07/28/2021   07:48:49  (  69.93,  59.31)    1.72                54
 07/30/2021   22:25:29   (  70.15,-159.81) 07/30/2021   22:24:20  (  70.14,-159.88)    2.40                69
 07/30/2021   23:15:00   ( -70.00,   7.60) 07/30/2021   23:15:01  ( -70.00,   7.66)    2.22                 1
 07/31/2021   00:04:30   (  69.71, 174.86) 07/31/2021   00:05:42  (  69.72, 175.38)   20.33                72