Nmeatime

Will no longer be supported. Please use NMEATime2 as an alternative. Purchase NMEATime v5.8.100 - To purchase this product please contact VisualGPS LLC. Currently NMEATime is over 10 years old! It only supports GPS NMEA string (Not GLONASS or Galileo). We recommend that you download NMEATime2 NMEATime will automatically set your PC clock using a GPS receiver connected to the serial port of a PC or to the National Institute of Standards and Technology (NIST) time servers over the Internet. Using network time or the time from a GPS receiver, NMEATime will keep your computer referenced to an atomic time standard. Features Digital desktop time code clock - like NASA has! Analog desktop clock Uses GPS Time to set your PC clock NMEA 0183 v2.20 - 3.01 compatible Software generated IRIG-B Output (requires sound card) Two Network time Protocols - Daytime NIST ACTS compatible and SNTP compatible Programmable time setting rate Selectable GPS NMEA message for time reference Random time server select mode from an editable server list Accepts 1 Pulse Per Second (1PPS) input in to RS-232 DSR or CTS port BONUS SCREEN SAVER! (ClockMaze) Transparent Clock! See what is behind the clock (XP and Win2000 only). Requirements For GPS time: GPS Receiver connected to a RS-232 port with NMEA 0183 output For network time: Access to the internet Windows 95/98, Win2000/XP, WinNT4.0 or higher with Internet Explorer 4.0 or higher Pentium 166MHz or higher microprocessor SVGA at least 800X600 resolution 16 megabytes of RAM 2 megabytes of disk

USB GPS looks to the PC as a USB to Serial driver that emulates the serial port. In the USB world, it’s referred as a CDC (communication device class) device. NMEATime2 will use the NMEA string (GPGGA) transmitted from the GPS, time tag the first character of the that command and use this as a timing reference. As you would expect, there are delays between the 1PPS epoch and the RS-232 causing software jitter. The delay can be calibrated out. NMEATime2 will use digital filtering (the red line you see in the Time Difference Plot - see below) and discipline the PC clock to this reference. Requirements Supports Windows 7, 8, 8.1 and Windows 10 The minimum NMEA sentence requirements matter. The most important is that the GPGGA and GPRMC message output once per second. GPGGA - must be once/second GPRMC - must be once/second GPZDA - must be once/second (NMEATime will use this sentence for time. If not available, then NMEATIme will use GGA & RMC for time.) GPGSA - every two seconds GPGSV - every two seconds Screen Shots If you like VisualGPS and would like to support more products like these, please donate. Suggest donation $5 USD Currently VisualGPS is over 10 years old! NMEA support is only limited to GPS NMEA strings (Not GLONASS or Galileo). We recommend that you download VisualGPSView. VisualGPS (Freeware) incorporates many advanced features found in professional programs. Its sole purpose is to display graphically specific NMEA 0183 sentences and show the

Effects of selective availability (SA). Features: Azimuth and Elevation Graph - View all satellites that are in view. Each satellite identifies its pseudo random number (PRN) and its azimuth and elevation. Also plot and print the physical mask angle. Survey - The survey window displays both position and xDOP (HDOP and VDOP) parameters. The ability for user selectable HDOP/VDOP color thresholds for position averaging make a great utility. Also monitor Standard Deviation and effects of Selective Availability. That's not all - print the results graphically. Signal Quality/SNR Window - Monitor satellite signal to noise ratios and see them graphically on the screen. The signal quality window will grow or shrink to accommodate number of satellites in view Navigation - Monitor latitude, longitude and altitude NMEA Command Monitor - View NMEA sentences as they are received Requirements: GPS Receiver connected to a RS-232 port with NMEA 0183 output - NMEA demo file included for those who do not have a GPS receiver Windows 2000 sp4, Windows XP, Vista or Windows 7 486 100MHz or higher microprocessor SVGA at least 1024X768 resolution 16 megabytes of RAM 6 megabytes of disk space One available RS-232 port (or captured NMEA text file - included) VisualGPS decodes the following NMEA 0183 sentences: GPGGA GPGSA GPGSV Download Download a free copy of VisualGPS program. It is a 32 bit program written for both the Windows 2000, XP and Vista environments. This software is freeware and cost is free. Download As of January 1st 2018, NMEATime (Legacy)