TEQC教程：GPS数据预处理与质量检查

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"UNAVCO_Teqc_Tutorial.pdf" 是一份关于使用TEQC软件进行GPS数据预处理和质量检查的教程。这份教程由Lou Estey和Stuart Wier编写，由UNAVCO开发并得到NSF（美国国家科学基金会）和NASA（美国国家航空航天局）的资金支持。主要内容涵盖了TEQC的基础使用、基本操作命令以及如何在Windows环境下运行。 TEQC是一个专用于处理卫星导航数据，特别是RINEX（接收机独立交换格式）格式的GPS和GLONASS观测数据的工具。RINEX格式是一种通用的标准格式，使得不同制造商的接收机数据能够被多种软件读取和处理。教程中，作者主要关注了数据的质量检查以及一些基本操作，但并未涉及所有功能。在快速启动章节，教程介绍了几个常见的TEQC命令： 1. **元数据**：提取或修改RINEX文件中的元数据信息。 2. **质量检查**：评估数据质量，识别可能存在的问题如信号丢失、噪声等。 3. **数据降采样**：减少数据密度以减小文件大小或简化分析。 4. **数据拼接**：合并来自多个时段的数据记录。 5. **翻译**：将数据转换为不同的格式。 6. **时间分桶**：用`tbin`选项进行时间间隔的数据聚合。 7. **实时数据流输入**：处理实时GPS数据流。在深入使用TEQC的部分，讲解了如何运行软件，特别是在Windows环境下的操作，以及命令行选项的使用，包括输入和输出文件的管理以及重定向。在开始翻译的章节，教程给出了基本的翻译命令行示例，并解释了输入文件格式的自动识别、典型的翻译选项和参数。RINEX导航消息的处理也是其中的一个关键点，因为这些消息包含了卫星系统的状态信息，对于数据处理和分析至关重要。 "UNAVCO_Teqc_Tutorial.pdf"是学习和掌握如何利用TEQC进行GPS数据处理和质量控制的宝贵资源，特别适合于地震监测、地球动力学研究或其他需要精确GPS数据的科学应用领域的研究人员和专业人士。通过这份教程，用户可以学会如何有效地使用TEQC工具来优化他们的数据处理流程，确保数据的质量和可靠性。

Teqc Tutorial 9

& teqc +qc inputfile 2> /dev/null

The symbols > and 2> are Linux and UNIX output redirection commands, sending command output

(stdout and stderr) to a file, or to 'null.' For output redirection on Windows, see section 4.5.

Do qc-quick (+qcq) with no error messages shown or saved, and send the normal qc screen output to

outfile. No qc report file is made:

& teqc +qcq inputfile > outfile 2> /dev/null

Do qcq, and append a teqc QC symbol table (+sym) to the output:

& teqc +qcq +sym inputfile 2> /dev/null > outfile

Do qcq, and also add any standard error output to the single output file:

& teqc +qcq +sym inputfile > outfile 2>&1

3.1.3 Decimating Data

To 'decimate' (sub-sample) observations in a RINEX obs file, whose original sampling interval is

greater than 1 second, use option -O.dec <seconds>. For example to decimate to 60 seconds

interval, and save the results in the new file BCH164dec.12o:

& teqc -O.dec 60 BCH164.12o > BCH164_decim60s.12o

When the original sample interval is 1 second or less, you must also include the option -O.int to

define the original sampling interval in seconds (in most cases). For example, to decimate 10 Hz (0.1

second interval) data to 60 seconds:

& teqc -O.int 0.1 -O.dec 60 MKW164.12o > MKW164_decim60s.12o

So to decimate data to 30-second data:

where the original sampling interval is > 1 second, you just need use the '-O.dec' option, so to

decimate to 30-second output data, use '-O.dec 30'.

if the original sampling is < 1 second, then you usually include the '-O.int' option specifying

the original sample interval in seconds. For example use '-O.dec 30 -O.int 0.2' if the

original data is 5 Hz.

You should not need to include the '-O.int' option if reading a RINEX observation file that

includes the optional INTERVAL header line with the correct value.

Teqc Tutorial 11

3.1.6 Time binning with -tbin Option

You can use the teqc -tbin option to make daily RINEX met files from file 79990360.DAT:

& teqc -tr d -tbin 1d outputfile +met + 79990360.DAT

You can replace outputfile after the 1d with any string; this will be at the beginning of RINEX files'

names created with the -tbin option. The bare + sign after +met means make a sequence of met

files for 1 day time bins made with -tbin 1d.

For making daily (1d) observation and navigation RINEX files from a raw receiver file (when the

receiver file type is a type automatically recognized by teqc):

& teqc +obs + +nav +,+ -tbin 1d outputfile inputfile

The new file is outputfile. For making one hour (1h) long observation and navigation files:

& teqc +obs + +nav +,+ -tbin 1h outputfile inputfile

The +nav +,+ makes two nav files, one for GPS and one for GLONASS, both file names beginning

with prefix outputfile.

The -tbin command option and its arguments, -tbin 1d outputfile, make day-length files from

one input file. If the input file is several days long, several output obs and nav files will be made, one of

each for each day.

A bare " + " sign after +obs or after +nav means to make a sequence of obs and nav files which

match the 1 day time bins made with -tbin 1d. The option +nav +,+ means make separate GPS

and GLONASS nav files for the time bins. The tbinoutput represents the root name for all the new

files made. You can make hourly files by using -tbin 1h in place of -tbin 1d.

To make daily RINEX met files from a RINEX file 89670360.DAT:

& teqc -tr d -tbin 1d outputfile +met + 89670360.DAT

The new file name begins with prefix outputfile. You can replace outputfile with any name for

the beginning of the RINEX filenames created with the '-tbin' option.

For making daily time-binned observation and navigation RINEX files from many receiver files, you can

input a list of files:

& teqc +obs + +nav +,+ -tbin 1d tbinoutput input1 input2 input3

The list is separated with spaces.

On a LINUX type operating system you can use file name expressions to stand in for a list of file

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