Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 17.  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)
 07/17/2021   14:41:50   (  70.09, -44.00) 07/17/2021   14:41:04  (  70.06, -43.96)    3.29                46
 07/17/2021   15:31:20   ( -69.98, 123.47) 07/17/2021   15:31:46  ( -69.98, 123.48)    0.71                26
 07/20/2021   06:08:40   ( -70.94, -94.50) 07/20/2021   06:07:33  ( -71.02, -97.03)   92.19                67
 07/20/2021   06:58:21   (  70.07,  71.85) 07/20/2021   06:58:01  (  70.06,  71.82)    2.15                20
 07/20/2021   07:47:51   ( -69.96,-120.67) 07/20/2021   07:48:43  ( -69.97,-120.74)    2.81                52
 07/22/2021   22:25:26   ( -70.11,  20.13) 07/22/2021   22:24:13  ( -70.12,  20.18)    2.32                73
 07/22/2021   23:14:53   (  70.00,-172.38) 07/22/2021   23:14:57  (  70.00,-172.33)    1.76                 4
 07/23/2021   00:04:25   ( -69.78,  -5.04) 07/23/2021   00:05:37  ( -69.81,  -4.72)   12.49                72
 07/25/2021   14:41:57   ( -70.09, 135.98) 07/25/2021   14:41:09  ( -70.06, 136.03)    3.30                48
 07/25/2021   15:31:24   (  69.98, -56.53) 07/25/2021   15:31:54  (  70.00, -56.56)    2.64                30
 07/28/2021   06:08:45   (  70.82,  85.31) 07/28/2021   06:07:37  (  70.89,  83.16)   78.85                68
 07/28/2021   06:58:27   ( -70.07,-108.17) 07/28/2021   06:58:05  ( -70.06,-108.20)    1.42                22
 07/28/2021   07:47:54   (  69.95,  59.31) 07/28/2021   07:48:49  (  69.94,  59.29)    1.35                55
 07/30/2021   22:25:28   (  70.14,-159.82) 07/30/2021   22:24:20  (  70.15,-159.89)    3.12                68
 07/30/2021   23:14:59   ( -69.99,   7.60) 07/30/2021   23:15:01  ( -70.00,   7.65)    2.74                 2
 07/31/2021   00:04:30   (  69.65, 174.77) 07/31/2021   00:05:41  (  69.68, 175.45)   26.29                71