Instructions for filling out M3G site logs Oct 2019 See log form at ftp://igs.org/pub/station/general/blank.log General ======= Please prepare site logs in plain ASCII. Line length is limited to 80 characters. The site logs have to be machine-readable and therefore the original format must be respected. Validating and submitting a site log is done through M3G (https://gnss-metadata.eu/). Date and time formats within the site log follow the basic format "CCYY-MM-DDThh:mmZ" from ISO 8061; see http://www.iso.ch/iso/en/prods-services/popstds/datesandtime.html As a summary, CC=2 digit century YY=2 digit year MM=2 digit month DD=2 digit day of month T=date/time separator hh=2 digit hour mm=2 digit minutes of hour Z=UTC indicator /=separator when begin & end times are given A date without a time is specified like "2003-07-30", not "2003-07-30Thh:mmZ" Latitude/Longitude formats are aligned to ISO 6709: Lat: +/-DDMMSS.SS Long: +/-DDDMMSS.SS A + or - sign is required. Leading zeroes must be used as appropriate to maintain the DDMMSS and DDDMMSS format. Valid latitude range is -90 degrees to +90 degrees. Valid longitude range is from -180 degrees to (infinitesmally less than) +180 degrees. "etc" indicates you may enter any relevant answer, not just a choice of the suggestions shown. "F7.4," "A4" and so on indicate the FORTRAN-style format which the response should have. Example 12345.7 = F7.1 ABCD = A4 Blocks which have a "N.x" definition (namely from section 3 to 10) should always have the complete historic set of information; when a change is made, the previous information is left (for example in section 3.1) and the new information is placed in a new block numbered 3.2. Please leave the .x sections uncompleted to remind yourself of the format when the next change occurs. Please remove the response hints such as "(F7.4 N/S)" as you fill out the log (except in the .x sections and Date Removed fields for currently installed equipment, which you will not alter). If an answer in an optional field is unknown, try to learn the answer for the next log update. If you have any questions not answered here, please feel free to contact M3G (m3g@oma.be) Special Instructions by section ================================ 0. Form ----------- If Update: Previous Site Log : (sssssssss_CCYYMMDD.log) If the site already has a log at M3G, enter the filename currently found under ftp://gnss-metadata.eu/station/log/ sssssssss = 9 character site name If Update: Modified/Added Sections : (n.n,n.n,...) Enter the sections which have changed from the previous version of the log. Example: 3.2, 4.2 1. Site Identification of the GNSS Monument --------------------------------------------- IERS DOMES Number : (A9) This is strictly required. See http://itrf.ensg.ign.fr/domes_request.php to obtain one. Monument Description : (PILLAR/BRASS PLATE/STEEL MAST/FICTIVE/etc) Enter one or more elements as necessary to describe the monument. Additional Information : (multiple lines) Suggestions: electrical isolation 2. Site Location Information ----------------------------- Approximate Position (ITRF) This should be to a one meter precision. The elevation may be given to more decimal places than F7.1. 7.1 is a minimum for the SINEX format. 3. GNSS Receiver Information -------------------------------------- Receiver Type : (A20, from rcvr_ant.tab; see instructions) Please find your receiver in ftp://igs.org/pub/station/general/rcvr_ant.tab and use the official name, taking care to get capital letters, hyphens, etc. exactly correct. If you do not find a listing for your receiver, please notify M3G (m3g@oma.be). Satellite System : (GPS+GLO+GAL+BDS+QZSS+SBAS) Indicates what the receiver is currently tracking with the installed firmware. Acronyms can be found in the rcvr_ant.tab standard. Serial Number : (A20) Keep the 5 significant characters of the serial number field in SINEX in mind: do not enter "S/N 12345" instead of "12345" since valuable information will be lost. Firmware Version : (A11) Keep the 11 significant characters of the field in SINEX in mind. Elevation Cutoff Setting : (deg) Please respond with the tracking cutoff as set in the receiver, regardless of terrain or obstructions in the area. Temperature Stabiliz. : (deg C) +/- (deg C) This refers to the temperature (and the tolerance) of the room in which the receiver is housed. Date Removed : (CCYY-MM-DDThh:mmZ) In the block for the receiver currently in operation, leave this line (but without the parenthesis) as is to remind yourself of the format when the next receiver change is made. 4. GNSS Antenna Information --------------------------------------- Antenna Type : (A20 from rcvr_ant.tab; see instructions) Please find your antenna in ftp://igs.org/pub/station/general/rcvr_ant.tab and use the official name, taking care to get capital letters, hyphens, etc. exactly correct. If you do not find a listing for your antenna, please notify the IGS Central Bureau (mg@oma.be). Please do not use antenna names from a "Previously valid" section. Choose the corresponding new antenna name instead. The radome code from rcvr_ant.tab must be indicated in columns 17-20 of the Antenna Type, use "NONE" if no radome is installed. The antenna+radome pair must have an entry in ftp://epncb.oma.be/pub/station/general/epn_14.atx with zenith- and azimuth-dependent calibration values down to the horizon. If not, notify the CB. Serial Number : (A20) Keep the 5 significant characters of the serial number field in SINEX in mind: do not enter "S/N 12345" instead of "12345" since valuable information will be lost. Antenna Reference Point : (BPA/BCR/XXX from "antenna.gra"; see instructions) Locate your antenna in the file ftp://igs.org/pub/station/general/antenna.gra Indicate the three-letter abbreviation for the point which is indicated equivalent to ARP for your antenna. Contact M3G (m3g@oma.be) if your antenna does not appear. Marker->ARP Up Ecc. (m) : (F8.4) This is the antenna height measured to an accuracy of 1mm and defined as the vertical distance of the ARP (Antenna Reference Point) above the marker described in section 1. It must always be filled out, even if zero (use "000.0000") Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) These must be filled in if nonzero. Alignment from True N : (deg; + is clockwise/east) The positive direction is clockwise, so that due east would be equivalent to a response of "+90" Antenna Radome Type : (A4 from rcvr_ant.tab; see instructions) Place a Radome code from ftp://igs.org/pub/station/general/rcvr_ant.tab here. "NONE" indicates there is no external radome. If an antenna has a cover which is integral and not ordinarily removable by the user, it is considered part of the antenna and "NONE" is to be used for the radome code. The radome code used here has to be the same as the one in the columns 17-20 of the Antenna Type. Date Removed : (CCYY-MM-DDThh:mmZ) In the block for the antenna currently in operation, leave this line (but without parenthesis) as is to remind yourself of the format when the next antenna change is made. 5. Surveyed Local Ties ------------------------------------------------------------- Local ties to other markers on the site should be determined in ITRF coordinates to 1mm precision in all 3 dimensions. Offsets are given in geocentric Cartesian coordinates (ITRF). 8. Meteorological Instrumentation ------------------------------------------------------------- Height Diff to Ant : (m) Positive numbers indicate meteorological instrument is ABOVE GPS antenna. Do not forget to remove the unit "(m)". 12. Responsible Agency (if different from 11.) ------------------------------------------------------------- The primary contacts listed here should always be the first choice for questions about operation of the site. This person will receive automated emails regarding site log or RINEX errors and should be someone who can answer questions about the configuration and data delivery for this site. 13. More Information ------------------------------------------------------------- Primary Data Center : Secondary Data Center : Please list the DC where the station's data ordinarily goes first as "Primary." Use "Secondary" either for a second location where the station's data always goes, or would go in case of a long-term failure with the Primary DC. Enter the abbreviation of the DC name. Photos are mandatory for EPN stations. Send all available photos of antenna, radome, placement and all relevant photos to the EPN CB (epncb@oma.be). Additional Information: Anything you feel is important. Some possibilities to consider are: - Elevation mask table indicating physical mask effects such as AZ ELEV AZ ELEV AZ ELEV AZ ELEV 10 8 20 12 30 10 40 8 50 5 60 12 70 8 80 8 90 5 100 5 110 5 120 5 130 5 140 5 150 8 160 8 170 5 180 3 190 5 200 8 210 8 220 8 230 5 240 5 250 5 260 8 270 10 280 12 290 12 300 12 310 12 320 8 330 5 340 5 350 8 360 8 (This could also be kept at your local www site and referred to by URL in the log).