• 完毕之后,确认系统提示“USB Mass Storage Device 可安全移除”之后再从电脑上
取下 SD 卡
1.2.12.1.4. 已知兼容的 SD 卡
不是所有的 SD 卡都兼容 SMT888-3G。以下 SD 已经过
表 8: SD Card 兼容性
容量大小型号
256MB SanDisk ULTRA II SDSDH-256-901
1GB SanDisk Standard SDSDB-1024-A11
1GB SanDisk Standard SDSDB-2048-A11
1GB Integral
1GB SanDisk Ultra® II SDSDH-1024-901
2GB SanDisk Standard
2GB SanDisk Extreme® III SDSDX3-2048-901
2GB Kingston Ultimate (120x)
4.1.4. 红色静态指示灯打开。The RED Logging LED will turn ON. The SBF file
name is displayed followed by (logging) to indicate data is being written to
the SD card. Select Close File to end data logging or click the icon to
close the window and simultaneously perform other operations while
continuing logging.
务必先关机再取出SD卡。
4.2. 数据转换
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SD 卡记录的静态数据格式为 SBF,首先我们要其转换为 RINEX格式,转换需要
用到 SBF Converter软件。软件可到励精科技网站下载。
转换步骤:
1. 运行 SBF Converter,选择要转换的数据或文件夹:
2. 勾选 RINEX,点击 Options,设置如图:
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点击Obs options,观测选项,设置如下:
设置完毕之后,点击 Convert 开始转换:
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转换完毕后,即可将 RINEX 格式数据导入后处理软件进行解算。
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5. SMT888-3G 设备 & 规格
5.1 内置电台
规格
• 工作频率: 403MHz - 470 MHz
• 占有频宽: 6.25kHz, 12.5kHz or 25kHz
• 增益: 145-146dBm
您需要了解的
如何配置内置电台内置电台出厂时已配置好,一 般来讲是不需要客户
移动站收不到差分信号
5.2GSM 调制器
规格
• Quad band GSM/GPRS Class 10 Radio Device for true Global usage
1.2. Question: Where is the Antenna Reference Point (ARP) located on the
SMT888-3G?
Answer: The NGS ARP is the bottom of the bolt on the underside of the
SMT888-3G. The NGS calibration value for the SMART8800-3G L1 vertical
offset is 113.5 mm. For more information visit is:
Figure 69: NGS ARP Diagram
1.3. Question: Does the SMT888-3G L1 vertical offset need to be added to the
measured height to the bolt?
Answer: No, SurvCE recalls the vertical offset automatically when the
SMT888-3G is selected.
Figure 70: NGS Calibration adjustment
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1.4. Question: How do I know which battery I can remove without having
operations interrupted?
Answer: Use SurvCE to distinguish which battery is in use by following the
steps described in section 4.3.4. from the Equipment menu.
1.5. Question: How do I make the push button logging files increment rather
than appending once SurvCE has been used?
Answer: Send the increment command via the Send File utility, which and
be located via SurvCE à Equip Tab à GPS Utilities à Send Command.
Then enter: setFileNaming, DSK1, Incremental, PENTAX.
1.6. Question: How do I configure a unit back to the PENTAX factory defaults?
Answer: Located on the PENTAX CD there is a text file called “AsteRx2
PENTAX Default 04152009 Config.txt.” Follow the Factory AsteRx2 receiver
Settings section 5 of this manual to upload that file into the SMT888-3G.
1.7. Question: What are the correct specifications for a GSM SIM card in order
for it to operate with the SMT888-3G?
Answer: There are three key items that must be specified to get the correct
GSM SIM card and service from your cellular service provider;
1. GSM SIM card (not UMTS)
2. Data service only
3. No IMEI number (i.e. no associated hardware/handset)
SIM cards that had one or more of the above 3 features incorrect did not
work. In the USA, AT&T and T-Mobile provide GSM SIM cards that have been
used successfully with the SMT888-3G.
1.8. Question: Why am I not receiving GLONASS corrections?
Answer: You must first verify that the base station transmits GLONASS
corrections. The SMT888-3G first utilizes GPS satellites to get to RTK Fixed
status. Then if more than 2 acceptable GLONASS satellites are available, RTK
Fixed GPS+GLO RTK status is achieved.
1.9. Question: Why is my radio not receiving RTK corrections?
Answer: Check Base Station Configuration. Make sure that Base Station
receiver is set up and using more than 5 common Satellites. Check Rover
Configuration; make sure that it is configured to use the correct RTK format
corrections. Both Base Station and Rover must use the same UHF Radio Channel
and same correction format.
1.10. Question: How do I know which message type to select RTCM V2.3,
RTCM V3.0, CMR, or CMR+?
Answer: Base stations transmit different messages types. It is important
to confirm what message type(s) the base is transmitting so the Rover can be
set accordingly. SurvCE allows the Message types for some base stations to
be identified directly in SurvCE.
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1.11. Question: How can I verify the Windows Mobile® version my hand held
device is operating on?
Answer: In the main view of the controller, select the Start Menu, next click
Settings Menu, then select the System tab, lastly select the About icon
which will display the Windows Mobile® version.
1.12. Question: How do I delete points that have been stored in SurvCE?
Answer: One way to delete points is to go to the File tab and select the
Points button. Once in the Points Menu select the point and click delete.
1.13. Question: How do I change my settings in SurvCE to use metric,
International Feet, or US Survey Feet for the distance?
Answer: These settings must be set when starting a new job. In the File
tab select Job Settings, then select the System tab and choose the Distance
Units from the drop down menu.
1.14.Question: How do I stop the SMT888-3G from logging automatically on
startup?
Answer: The SMT888-3G remembers the settings set during the last
configuration and uses these upon restart. To stop logging upon startup,
Close the Data File and reconfigure the base/rover. Reconfigure by selecting
the green check mark on GPS Base/Rover tab.
1.15. Question: I can’t connect to the SMT888-3G via Bluetooth®, why not?
Answer: Make sure that the serial cable (SER1) is disconnected. The
serial cable takes precedence to Bluetooth® connectivity, and because of this
Bluetooth® is unable to connect when the cable is attached. Also verify the
Bluetooth® is ON/Visible on the controller (Archer, Allegro CX, or Allegro MX).
See Bluetooth® section for setup.
1.16. Question: How do I update my data collector to the latest Software
version?
Answer: Download the SurvCE version at http://www.survce.com/
approved by Altus. Connect the data collector to a PC (via Serial or USB
connection). Use Active Sync to synchronize files by checking the files box,
then run the latest SurvCE version executable and perform the tasks as
directed on the screen. Once completed, software version can be verified in
the “Equip” tab of SurvCE in the “About SurvCE” menu. If the version is not
on the website, contact PENTAX Support.
1.17. Question: I noticed that the units get extremely hot at the top, what
effect might this have on any operations?
Answer: The SMT888-3G is designed to operate reliably from -20 to +65 °C.
Like most manufacturers, we test beyond that limit to ensure we can operate
at the published extremes.
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1.18.Question: What can be expected in the potential 2010 GPS meltdown?
Answer: The GPS constellation is well over 25 years old now [not all birds].
There have been delays in launching newer technology birds, but it doesn't
necessarily mean the older satellites will shut down; it doesn't mean they
won't either! Worst Case: DOD requires 95% probability of 24 satellites at
any given time. Best Case: The existing satellites will last 20 more years
before shutting down and something new and improved will take its place.
1.19. Question: How do I update the SMT888-3G to the latest firmware
version?
Answer: Get the latest firmware release from Altus. Connect the 5 pin
controller serial cable (SER1) to the bottom of the SMT888-3G, connecting
the DB9 side of the cable to a PC’s RS232 serial port. Power on the
SMT888-3G and open RxControl. Once connected to the SMT888-3G click
the tools tab and select upgrade receiver. Click Ok to close connection.
Then click “Next” in the RxControl Upgrade Wizard. Next select the COM
port used for the connection between the SMT888-3G and computer
followed by clicking “Next”. Locate the appropriate SUF file, and click
“Next”. Then select “Upgrade”, and proceed with any other on screen
directions. Once completed, firmware version can be verified in the “Help”
tab of RxControl in the “Receiver Identification” menu. It can also be
checked in SurvCE, follow “viewing battery status” section 4.3.4 where the
firmware can also be identified.
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常见 GNSS 相关缩写
APME A Posteriori Multipath Estimation
ARP Antenna Reference Point
ASCII American Standard Code for Information Interchange
CMR Compact Measurement Record
CPU Central Processing Unit
CR Carriage Return
CTS Clear to Send
DGPS Differential Global Positioning System
DOP Dilution of Precision
EGNOS European Geostationary Navigation Overlay System
ESTB EGNOS System Test Bed
FPGA Field Programmable Gate Array
GLONASS Global Orbiting Navigation Satellite System (Russian alternative for GPS)
GNSS Global Navigation Satellite System
GPRS General Packet Radio Service
GPS Global Position System
GPX GPS eXchange
GSM Global System for Mobile communications
GUI Graphical User Interface
HERL Horizontal External Reliability Level
HPL Horizontal Protection Level
IGS International GNSS Service
LAMBDA Least-squares Ambiguity Decorrelation Adjustment
LED Light Emitting Diode
MDB Minimal Detectable Bias
MOPS Minimum Operational Performance Standards
MSAS Multi-functional Satellite Augmentation System
MT Message Type
NGS National Geodetic Survey
NMEA National Marine Electronics Association
OEM Original Equipment Manufacturer
OTF On the Fly
PPS Pulse Per Second
PVT Position Velocity Time
RAIM Receiver Autonomous Integrity Monitoring
RINEX Receiver INdependent Exchange Format
ROM Read Only Memory
RTCA Radio Technical Commission for Aeronautics
RTCM Radio Technical Commission for Maritime Services
RTK Real Time Kinematic
SBAS Satellite Based Augmentation System
SD Secure Digital
SDHC Secure Digital High Capacity
SIM Subscriber Identity Module
UHF Ultra high frequency
VRS Virtual Reference Station
WAAS Wide Area Augmentation System
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