Free measurement software for linux

KAstrometry is an astrometry program for KDE. It is written in Python. It aims to be a good tool to make measurements of objects in space from images taken by CCD cameras.

Such measurements might be used to find orbits of astroids or record the brightness of variable stars. One day, it should be able to record an objects position, detect stars, and find coordinates using star catalogs

mod_arm provides a simple, seamless, and application independent interface to ARM (Application Response Measurement).

mod_arm allows system administrators to get an accurate idea of how long an application takes on a running server - for a single instance or as a step in a multi-tier transaction. This is definitely a work in progress.

Configuration Directives

Arm

Syntax: Arm state
When state is on, ARM measurements will be taken for this directory
When state is application, ARM measurements will be controlled by the application scripting language such as PHP (not yet implemented)
When state is off, no measurements are taken for this directory

ArmApplication

Syntax: ArmApplication application_name
Specifies the application name to use for this directory. If non is specified, the default value of "Apache" is used.

ArmUser

Syntax: ArmUser user_name
Specifies the user name for the transaction. If none is specified, the default value of "*" is used

ArmTransaction

Syntax: ArmTransaction transaction_name
Specifies the name of the transaction. If none is specified, the default value will be the URI of the object requested.

ArmTransactionInfo

Syntax: ArmTransactionInfo transaction_info
This is an informational string used to descibe the transaction, primarily for use by transaction correlators. If not specifed, the default value is "Apache web page".

Survex provides a software suite for processing, viewing, and printing cave survey data.
It is multi-platform and multi-lingual, can deal with extremely large and complex datasets, and can read survey data from many sources.
A sophisticated GUI visualization tool (Aven) is included as well as the data processing tool (Cavern) and a data entry tool (Survex-edit).
There are also printing and data conversion tools. Printing for HPGL, Postscript, PCL (Laser/inkjet), and Dot-matrix printers is supported.
Output converters to DXF and extended elevation form are included.
Survey data can be read in native Survex form, or Compass or CMAP files.
Conversion from other formats such as SMAPS is easily accommodated.
Main features:
- Its free! Survex is distributed with full source code under the GNU Public License. Other coders are encouraged to help add features.
- Multi-platform - using Survex doesnt force everyone working on your survey project to use the same operating system. Survex is designed to be portable, so getting it to run on palmtop machines should be fairly easy - Wookeys got Survex running on the Compaq iPaq running Linux.
- Internationalisation support - translations supplied for English, French, German, Spanish, Catalan, Portuguese, Italian, Slovak, Romanian, and US English.
- Hierarchical survey station naming.
- Fast processing of survey data in a wide range of formats, aided by sophisticated network simplification techniques (which also reduce memory requirements allowing Survex to be used on low end machines).
- Cave complexity limited only by available memory. No arbitrary limits on number of legs, number of surveys, length of station names, number of fixed points, etc.
- Include files allow `projects for survey data management. A survey, or collection of surveys, can be included in many different projects.
- No restrictions on the order survey data can be read in - theres no need to artificially reorder your data to make sure each survey leg connect to a previously read one.
- Support for a wide range of data styles, including "interleaved data", backsights, underwater surveys performed with a depth gauge, and unsurveyed visual connections.
- Network reduction with loop closure errors distributed by least squares. Standard errors and closure errors are reported. Theres also an experimental gross error (blunder) detector.
- Data can be partially processed, loops closed, and then more data processed which will not move the existing stations - useful for adding a loop to an existing map without redrawing the whole thing.
- All instruments (e.g. tape, compass, clino, topofil, depth gauge) have optional scale and zero corrections.
- Special handling for plumbed legs (where the clino correction doesnt apply).
- Magnetic deviation separately specifiable to compass calibration (useful for survey projects lasting many years).
- Support for most input units: metres, feet, degrees, mils, grads, minutes, and also user specifiable units. Percent gradient is also supported.
- Each measurement can have its Standard Deviation specified separately (for specifying the grade of a section, giving special treatment to an odd or suspicious measurement, or feeding in measurements derived from techniques such as radiolocation).
- Fast redraw and bank-switching techniques give smooth, responsive animation.
- Large printouts can be produced on multiple pages with cut-marks to indicate where to cut and join the pages together.
- Support for printing using Microsoft Windows printer drivers; also native drivers for PostScript, ESC/P (Epson, IBM Proprinter, Canon BJs and compatibles), PCL (HP Laserjets, Deskjets and compatibles), and HPGL (HP pen plotters and compatibles).
- Colour printing supported when using Microsoft Windows printer drivers, or the included Postscript driver.
Whats New in 1.1.12 Release:
- Aven now remembers its windows size (or maximized/fullscreen status) between invocations. The "Export as..." menu item now brings up an options dialog like "Print..." does.

Time::Warp is a Perl module to control over the flow of time.

SYNOPSIS

use Time::Warp qw(scale to time);

to(time + 5); # 5 seconds ahead
scale(2); # make time flow twice normal

Our external experience unfolds in 3 1/2 dimensions (time has a dimensionality of 1/2). The Time::Warp module offers developers control over the measurement of time.

API

to($desired_time)

The theory of relativity asserts that all physical laws are enforced relative to the observer. Since the starting point of time is arbitrary, it is permissable to change it. This has the effect of making it appear as if time is moving forwards or backward instanteously. For example, on some types of operating systems time starts at Wed Dec 31 19:00:00 1969 (this will likely change as we approach 2030 and with the acceptance of 64-bit CPUs).

to(time + 60*60); # 1 hour ahead

scale($factor)

Changes the speed at which time is progressing.

scale(scale * 2); # double the speed of time

Note that it is not possible to stop time or cause it to reverse since this is forbidden by the second law of thermodynamics.

SmokePing is a delux latency measurement tool. SmokePing project can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm datastore and to draw pretty graphs, giving up to the minute information on the state of each network connection.
SmokePing uses latency measurement plugins for seamless extendability.
SmokePing comes with a smart alarm system. Apart from simple threshold alarms, you have the option of defining latency or loss patterns and use them to trigger alarms.
This allows you to define a pattern which would generate a single alarm when the loss goes from below 1% to over 20% and stays over 20% for more than 10 minutes. The advantage of this approach is the virtual elimination of duplicate alarms which you would get with a simple threshold based system.
Alarms can be sent to a mail address or a pager and if you want you can also start an external script to handle the alarms.
Complex Alarms can be written as plug-ins.
SmokePing can also deal with machines who frequently change their IP address by allowing the remote host to call SmokePings attention to its new IP address. In such a setup SmokePing monitors also for how long the remote system could keep its IP address.
To ensure that it is not suddenly monitoring the wrong host, SmokePing further tries to fingerprint each of its Dynamic IP targets via SNMP.
SmokePing is written in Perl. It consists of a daemon process responsible for data collection and a CGI script presenting the data on the web.
The CGI script uses SpeedyCGI to achieve mod_perl like performance without the need to deploy mod_perl on your web server. SmokePing sports a plug-in architecture to easily add new latency measurement capabilities to SmokePing. SmokePing works happily on all Unix platforms.
Enhancements:
- The scoreboard has a list of hottest targets.
- Echoping V6 compatibility.
- Mail templates.
- A failover server for alert email messages.
- Many new plugins.
- Several bugfixes.

Suri Pluma is a satellite image processing tool and visualizer.
Suri Pluma project can open the most common image formats without importing to an internal format and minimizing the memory required for visualization.
It is designed to be modular and extensible. It has a meassurement tool (distance and areas with error estimation) and geographical and map coordinate information.
Designed with state of the art techniques and tools, it offers means to extract information in easy and intuitive ways, offering to the user quantitative and qualitative information immediatly, taking full profit of the different satellite sources.
It provides simplified access to the different data formats and exports to the most common and spreaded formats. It takes full advantage of the hardware resources, with very low minimal requirements.
The goal is to provide the user with a high quality software, bringing a simple tool for image processing and remote sensing.
Main features:
User Interface
- Windows based single-document user interface (SDI) for more flexibility.
- Intuitive graphic user interface, making the tasks simple for both beginner and advanced users.
Input file formats
- Automatic opening of Fast Format images (including SAC-C and Landsat), Tiff and GeoTiff distribuited by CONAE, as well as the different formats used by GLCF and other propietary formats as the ENVI format. Also supports standard graphic formats like Jpg, Png and Bmp.
- Image type auto detect. There is no need to import for visualization the data with known formats.
- Direct access to the different data types without conversion.
- Immediate opening images independently from their size.
- Opening many images at once without memory overflow.
- Supports generic RAW binary format with manual definition of parameters.
Image analysis:
- Area and distances measurement tools available.
- Planar coordinate and pixel value displaying in real-time.
Image visualization:
- RGB color composite viewing capabilites.
- Grayscale viewing capabilites.
- Zoom In/Out capabilites using the wheel on the mouse.
- Flexible navigation using Scroll/Zoom windows.
Image enhancement:
- Linear and nonlinear contrast enhancement.
- Histogram equalization.
Geographic location:
- Automatic recognition of georeferenced meta-data of the different formats, making possible the search of areas of interest by geographic coordinates.
Export images:
- Exports to different image formats, making Suri compatible with other analysis tools. Available on Suri Pluma V1.1.
Minimal requirements:
- Takes advantage of the hardware resources, making possible the visualization and analysis of big images in low-end hardware with great efficiency.
Available platforms:
- Suri is developed in C++ in Linux and Windows environments simultaneously and distribuited in both systems.