sanitized config file for ntp+gpsd using ArduSimple RTK-2B on pi3

ntp.conf

# /etc/ntpsec/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

# Drift file etc.
# Ensure that the directory exists, and is writable by whichever user
# the ntpd daemon runs as.
driftfile /var/lib/ntpsec/ntp.drift
leapfile /usr/share/zoneinfo/leap-seconds.list

# Enable this if you want statistics to be logged.
statsdir /var/log/ntpsec/

statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable

logconfig =syncall +clockall +peerall +sysall
logfile /var/log/ntpsec/ntpd.log  

# Prefer the precise clock at unit 1 over the imprecise one at unit 0.
# GPS PPS reference (NTP1) (kernel PPS driver, aka ATOM(ic) )
# refclock shm unit 1 refid PPS
server 127.127.22.0 minpoll 0 maxpoll 4 prefer
fudge 127.127.22.0 refid PPS time1 +0.001 stratum 0 flag3 1

# GPS Serial data reference (NTP0) via SHM(28) or NMEA(20 - see mode on server) gpsd driver
server 127.127.28.0 minpoll 0 maxpoll 4 iburst                  # mode 65552
fudge 127.127.28.0 time1 +0.112 refid GPS stratum 1 flag4 1 flag1 1    # average offset for the MSgps puck is 11.2271 seconds in SiRF mode; use NMEA mode, ~340ms !

###  "maxpoll 5"  works around linux ARP cache flush timeout being 4 seconds
### prior to the standard poll time of 64 seconds.  Oops.
### keep it constant at 32 seconds with minpoll 5.  (2 ^ 5 == 32)

server 192.168.1.1 iburst minpoll 5 maxpoll 5 key 1

# NTP us pool
# pool us.pool.ntp.org iburst minpoll 5 maxpoll 5
#
# NIST IPv6 clock
#server 2610:20:6f97:97::6 iburst minpoll 5 maxpoll 5 prefer            # time-e-wwv.nist.gov

# path for key file
keys /etc/ntpsec/ntp.keys

trustedkey 1 2 3 4 5 6 7 8 9 10 # trusted peer keys
controlkey 10   # key for accessing server variables

# By default, exchange time with everybody, but don't allow configuration.
restrict default kod limited nomodify nopeer noquery
restrict -6 default kod limited nomodify nopeer noquery

# Local users may interrogate the NTP server more closely.
restrict 127.0.0.1 
restrict ::1 
restrict 192.168.0.0/23  notrust