m12m oncore™导航型(navigation)的主要特点 • 12个并行通道 • ttff典型值<15秒 • ttff典型值<40秒 • ttff典型值<60秒 • 典型重捕获时间<1.0秒 • 天线电流检测• 支持dgps信息输入• 3v时电源功耗仅为155mwm12m oncore™导航型接收器是一款**的具有１２通道ｇｐｓ传感器．它能作为一个组件被使用在**定位，导航，或授时系统中．m12m能够提供**的位置，速度，和时间等即时信息。 支持逆向差分的能力,m12m能准确的给出高**的位置。 高性能快time to first fix (ttff) 和一刹那分秒典型重捕获时间。 超精密 使用逆向dgps来获取高精度, m12m的设计适合需要**地位的场合。 高灵活度包括rtcm差分gps支持,nmea0183输出,2个通讯口,1个用户可控制的速度滤波器和1个天线传感电路.电源性能功耗为155mｗ@３v, 不含天线．后备电池电源5mah, 可维持２周到１个月．
m12m初步规格：
m12m navigation oncoretm receiver
preliminary specification
12 channel simultaneous operation
< 15s typical hot start ttff
< 40s typical warm start ttff
< 60s typical cold start ttff
< 1.0 s internal reacquisition antenna
current sense detection inverse/ dgps support
155mw power consumption @ 3v operation
general
characteristics
receiver architecture
12 parallel channel
l1 1575.42 mhz
c/a code (1.023 mhz chip rate)
code plus carrier tracking (carrier aided tracking)
tracking capability
12 simultaneous satellite vehicles
performance
dynamics
velocity: 1000 knots (515 m/s) > 1000 knots (515 m/s); at
altitudes < 60,000 ft.(18000m)
acceleration: 4g
jerk: 5 m/s3
vibration: 7.7g per military standard 810e
acquisition time
(time to first fix, ttff)
(tested at –40ºc to +85ºc)
< 15 s typical ttff-hot (with current almanac, position, time and
ephemeris)
< 40 s typical ttff-warm (with current almanac, position, time)
< 60 s typical ttff-cold (no stored information)
< 1.0 s internal reacquisition (typical)
positioning accuracy
< 5 m, 1-sigma
< 10 m, 2-sigma
timing accuracy
(1 pulse per second, 1 pps)
< 500 ns, 2-sigma
datum
wgs-84 default
one user definable datum
antenna
antenna requirements
active antenna module powered by receiver module (80ma max)
10db to 50db external antenna gain measured at receiver input
3 vdc or 5 vdc antenna power provided via header connector
serial
communication
output messages
latitude, longitude, height, velocity, heading, time
motorola binary protocol at 9600 baud
nmea 0183 (gga, gll, gsa, gsv, rmc, vtg, zda)
software se-lectable output rate (continuous or poll)
ttl interface (0 to 3 v)
second com port for rtcm input
electrical
power requirements
2.8 vdc to 3.3 vdc; 50 mvp-p ripple (max)
keep- alive ” batt power
external 2.2 vdc to 3.2 vdc, 5 ua typical @ 2.7 vdc @ 25oc
power consumption
155 mw @ 3 v without antenna
physical
dimensions
40.0 x 60.0 x 13.0 mm (1.57 x 2.36 x 0.53 in.)
weight
receiver 12.5 g
connectors
data/power: 10 pin (2x5) unshrouded header on 0.050 in.
centers (straight configuration)
rf: right angle mmcx
antenna to receiver
interconnection
single coaxial cable (with power on center conductor to support
active antenna)
antenna sense circuit
environmental
operating temperature
-40oc to +85oc
storage temperature
-40oc to +105oc
humidity
95% over dry bulb range of +38oc to +85oc
altitude
18,000 m (60,000 ft.) maximum
> 18,000 m (60,000 ft.) for velocities
< 515 m/s (1000 knots)
miscellaneous
standard features
motorola dgps corrections at 9600 baud on com 1
rtcm sc-104 input type 1 and type 9 messages for dgps at
2400, 4800 or 9600 baud on com 2
inverse dgps support
optional features
lithium battery backup