[root@hermes:~]$ gpsd -V
gpsd: 3.23.2~dev (revision release-3.23.1-61-g9abd23fd9)
[root@hermes:~]$ gpsd -n /dev/ttyS0

Oct  9 19:40:28 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 assert  1633804828.024661111, sequence: 524, clear   1633804828.999060237, sequence: 524 - using: clear
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 Clear cycle: 999999, duration: 974399 @  1633804828.999060237
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Clear pps-detect changed to 0
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Clear cycle: 999999, duration: 974399 @  1633804828.999060237
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Clear categorized 1Hz leading edge
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:INFO: PPS:/dev/ttyS0 Clear hooks called clock:  1633804828.999060237 real:  1633804829.000000000: accepted
Oct  9 19:40:28 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Clear accepted @  1633804828.999060237 offset  0.000939763
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 assert  1633804829.024660689, sequence: 525, clear   1633804828.999060237, sequence: 524 - using: assert
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 Assert cycle: 999999, duration: 25600 @  1633804829.024660689
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Assert pps-detect changed to 1
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Assert cycle: 999999, duration: 25600 @  1633804829.024660689
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Assert ignored 1Hz trailing edge
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 assert  1633804829.024660689, sequence: 525, clear   1633804829.999046479, sequence: 525 - using: clear
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 Clear cycle: 999986, duration: 974385 @  1633804829.999046479
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Clear pps-detect changed to 0
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Clear cycle: 999986, duration: 974385 @  1633804829.999046479
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Clear categorized 1Hz leading edge
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:INFO: PPS:/dev/ttyS0 Clear hooks called clock:  1633804829.999046479 real:  1633804830.000000000: accepted
Oct  9 19:40:29 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Clear accepted @  1633804829.999046479 offset  0.000953521
Oct  9 19:40:30 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 assert  1633804830.024647058, sequence: 526, clear   1633804829.999046479, sequence: 525 - using: assert
Oct  9 19:40:30 hermes gpsd[948197]: gpsd:PROG: KPPS:/dev/ttyS0 Assert cycle: 999986, duration: 25600 @  1633804830.024647058
Oct  9 19:40:30 hermes gpsd[948197]: gpsd:RAW: PPS:/dev/ttyS0 Assert pps-detect changed to 1
Oct  9 19:40:30 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Assert cycle: 999986, duration: 25600 @  1633804830.024647058
Oct  9 19:40:30 hermes gpsd[948197]: gpsd:PROG: PPS:/dev/ttyS0 Assert ignored 1Hz trailing edge