Next: Direct Access to UV Up: UV Data Sets Previous: Reading and Writing Visibilities . Miriad uv datasets can contain both spectral and continuumn visibility data simultaneously. ... However this allows only one ``linetype'' to be read and written at a time. The uvwread and uvwwrite allow the programmer to read and write the continuum data independently of the ``linetype''. ... Uvwread should be called after the call to uvread , whereas uvwwrite should be called before the call to uvwrite . ...

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• Direct Access to UV Variables
• Reading and Writing Blanking Information
• Reading and Writing Visibilities

... Several tape drives (1/2 inch, QIC, 8mm, DAT) are available on the UNIX system. ... If you want to write on the tape remember to enable writing. ... Concerning 1/2 inch tapes: . ... QIC-150 drives can only write on high density tapes DC600XTD or DC6150 however they can read QIC-24 low density tapes DC300XL or DC600A. QIC-24 drives use only low density tapes DC300XL or DC600A. QIC tapes are write protected when the round switch in the tape points to the "SAVE" position; write enable otherwise. ...

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• Writing a GtkWidget
• HwB: PCI (Tech) Connector
• Writing FITS

... This is called disk buffering , and the memory used for the purpose is called the buffer cache . Since memory is, unfortunately, a finite, nay, scarce resource, the buffer cache usually cannot be big enough (it can't hold all the data one ever wants to use). ... On the one hand, data that is written is often soon read again (e.g., a source code file is saved to a file, then read by the compiler), so putting data that is written in the cache is a good idea. ...

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• Access control
• Background
• Two kinds of devices

The HyperNews Linux KHG Discussion Pages . Forum: The Linux Kernel Hackers' Guide . Re : writing/accessing modules ( Jones MB ) . Keywords: module . Date: Wed, 01 Oct 1997 14:12:17 GMT . From: Michael K. Johnson < johnsonm@redhat.com > . There's a whole huge section of the KHG on writing device drivers. Register a character device driver and use either read()/write() or ioctl() to communicate between the user-level app and your module.

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• HwB: PCI (technical) Connector (Offline)
• User-space device drivers
• htpasswd - Manage user files for basic authentication - Apache HTTP Server

Comedi Documentation . ... Right to the source: #include <stdio.h> /* for printf() */ #include <comedilib.h> int subdev = 0; /* change this to your input subdevice */ int chan = 0; /* change this to your channel */ int range = 0; /* more on this later */ int aref = AREF_GROUND; /* more on this later */ int main(int argc,char *argv[]) { comedi_t *it; lsampl_t data; it=comedi_open("/dev/comedi0"); comedi_data_read(it,subdev,chan,range,aref,&data); printf("%d\n",data); return 0; } . ...

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• FIFOs
• LWN: Using read-copy-update
• Shared Memory Segments

... File format . ... The p12mProg is the AO control program for the 12 meter telescope. ... the time from the tick, till when we complete the status read from the device. ... P12M_STAT_BLK struct (read from controller via group read at tick) . ... azimuth master 32bit status word . ... dbl . ... azimuth error read from controller. ... azimuth velocity read back from controller deg/sec . ... elevation position read back from controller. stBlk.elErr_D . ... elevation velocity read back from controller . ...

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• WAPP - Snap Page
• pdev_software

... Abstract Read data from a character column in a specified EK record. ... Brief_I/O Variable I/O Description -------- --- -------------------------------------------------- handle I Handle attached to EK file. segno I Index of segment containing record. recno I Record from which data is to be read. column I Column name. lenout I Maximum length of output strings. nvals O Number of values in column entry. cvals O Character values in column entry. isnull O Flag indicating whether column entry is null. ...

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• Using Tapes
• Python: module StringIO
• A Guide to Kermit Data

This widget is used to select an HDS file for opening. ... Click on a file to select it. Note that opening a file from the command line is also possible and usually quicker and easier to use, e.g. hds_open,'1998-10-17.con'. The files are opened for read-only access. Another hint: note that buttons labeled in capital letters create a new widget for the selected action, whereas buttons labeled with small letters immediately execute the procedure linked to that button. ... Back to tour page . ...

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• Open a data file
• OIFITS reader
• A visual tour

... Table files like the ones created in the section on imcnts can be displayed, printed and manipulated using the tasks contained in the stsdas.ttools package. ... sp> tables # Load the relevant package ta> tprint rp90_cnt prpar=yes # .tab extension assumed # the hidden parameter prpar is set to display the header # as well as the data ta> tprint rp90_cnt # Displays only the data info ta> tprint rp90_cnt prdata- prpar+ # Displays only the header info ta> tprint rp90_cnt prparam=yes | ...

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• Reading Einstein FITS files
• IDL Program Help Pages
• The SAOimage Menu (options within SAOimage)

To give yourself permission to execute a file that you own: chmod u+x file1 . ... To give members of your group permission to read a file: chmod g+r file2 . This gives the group permission to read the file "file2". To give read permission to everyone for a particular type of file: chmod a+r *.pub . ... To give the group write and execute permission: chmod g+wx $HOME/SCCS . This gives all members of the group permission to place files in the directory SCCS in your home directory. ...

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• Executing a shell script
• Setting access permissions numerically
• Summary of access permissions

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

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