|
|
m12m oncore™授时型(timing)的主要特点
• 12个并行通道,可同时跟踪12颗卫星
• 完全校准到 utc时间
• 应用时钟间隔信息性能
• < 2纳秒1 sigma 平均值
• < 6纳秒6 sigma 平均值
• 无时钟间隔信息性能
• < 10纳秒 1 sigma 平均值
• < 20纳秒 6 sigma 平均值
• 155mw低功耗
m12m timing oncore™接收器是一款具有１２通道ｇｐｓ授时模块，能产生高达纳秒级的同步授时．主要特点包括高精度，可编程,带有每秒钟一个脉冲或每秒钟100个脉冲的时序输出.**的gps,准确的utc,合理的价格装备可以使您的gps产品尽善尽美. m12m更利用了 motorola的时间raim算法（接收器自主检测），确保了gps测量的有效性和可靠性。
m12m在投放市场前都经过了各种跌落性实验和温度实验的测试,确保m12m的设计能工作在各种恶劣的条件下。
高精密
经过广泛测试表明, m12m timing oncore™的授时**度高达2纳秒。
|
自动站点导航模式
总共平均1万个有效的2维和3维定位点决定了物体**的位置,同时静态授时的应用也简化了系统的安装。
快速升级
使用位置模式,m12m能够在不改变卫星的位置的情况下快速升级时间。
射频抗干扰
抗干扰功率高达10dbm,防火墙利用自适应循环追踪算法。
时钟间隔信息
利用m12m timing oncore™时钟间隔软件输出, 1pps的输出以utc时间为标准,其误差小于2纳秒,随着噪声的降低,主时钟的处理频率增加。
| m12m timing oncore 初步规格： |
m12m timing 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
characteristics
|
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)
< 150 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 (pps), or
100 pps)
|
performance using clock granularity message:
< 2 ns, 1-sigma
< 6 ns, 6-sigma
performance not using clock granularity message:
< 10 ns, 1-sigma
< 20 ns, 6-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) |
|
electrical
characteristics
|
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
characteristics |
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
characteristics |
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
|
position hold with automatic site survey
clock granularity error message
t-raim (timing receiver autonomous integrity monitoring) |
|
optional features |
lithium battery backup |