LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential LB150 WeatherStation Technical Manual Revision 0.013 08/07/08 - DRAFT This document is PRELIMINARY and Subject to Change.
LB150 WeatherStation Technical Manual revision 0.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Table of Contents 1. Introduction............................................................................................................. 1 2. NMEA 0183 Interfaces ........................................................................................... 2 2.1. Transmitted NMEA 0183 Sentences .................................................................. 2 $GPDTM..................................................
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential 1. Introduction This document is a supplement to the Airmar LB150 WeatherStation Owner's Guide. The LB150 WeatherStation is a multifunctional device that integrates several sensors into a single compact housing.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential 2. NMEA 0183 Interfaces The Airmar LB150 WeatherStation has a single standard NMEA 0183-compliant output channel, and a single standard NMEA 0183-compliant input channel. The unit transmits standard NMEA 0183 sentences on its output channel. It also recognizes standard and proprietary NMEA 0183 sentences received on its input channel.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential The Maximum Length (chars) column in the table indicates an expected worst-case scenario that can be used for bandwidth budgeting.
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LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPDTM Summary NMEA 0183 standard Datum Reference. Syntax Fields $GPDTM,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>*hh <1> Three character alphabetical code for local datum: W84 (WGS84) W72 (WGS72) S85 (SGS85) P90 (PE90) or IHO datum code from the International Hydrographic Organization Publication S-60 Appendices B and C.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential KGS, OHI-A, OHI-B, OHI-C, OHI-D, OHI-M, SIR, P90, and S85 are not currently supported by the GPS Engine used in the LB150, and therefore are not available for use as Local Datum.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPGGA Summary NMEA 0183 standard GPS Fix Data. Syntax Fields $GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>, <9>,<10>,<11>,<12>,<13>,<14>*hh <1> UTC of position, in the form hhmmss <2> Latitude, to the nearest .0001 minute <3> N if field <2> is North Latitude S if field <2> is South Latitude <4> Longitude, to the nearest .
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential <12> M. This field is not provided by the LB150 WeatherStation, and appears as a null field. <13> Age of Differential GPS data, seconds. This field is not provided by the LB150 WeatherStation, and appears as a null field. <14> Differential reference station ID, 0000-1023. This field is not provided by the LB150 WeatherStation, and appears as a null field. Default State Enabled. Transmitted once per second.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPGLL Summary NMEA 0183 standard Geographic Position – Latitude/Longitude. Syntax Fields $GPGLL,<1>,<2>,<3>,<4>,<5>,<6>,<7>*hh <1> Latitude, to the nearest .0001 minute <2> N if field <1> is North Latitude S if field <1> is South Latitude <3> Longitude, to the nearest .
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPGSA Summary NMEA 0183 standard GNSS DOP and Active Satellites.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPGSV Summary NMEA 0183 standard GNSS Satellites in View.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Default State Disabled. Transmitted once per second when enabled. This sentence is transmitted in groups of up to three instances, containing data for up to 4 satellites with each instance, for a total of up to 12 satellites. Fields <1> and <3> only contain data in the first instance; they are null fields in the second and third instances. Notes This sentence may be enabled via the $PAMTC,EN,GSV command.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $HCHDG Summary NMEA 0183 standard Heading, Deviation and Variation. Syntax Fields $HCHDG,<1>,<2>,<3>,<4>,<5>*hh <1> Magnetic sensor heading, degrees, to the nearest 0.1 degree. <2> Magnetic deviation, degrees east or west, to the nearest 0.1 degree. <3> E if field <2> is degrees East W if field <2> is degrees West <4> Magnetic variation, degrees east or west, to the nearest 0.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $HCHDT Summary NMEA 0183 standard Heading relative to True North Syntax Fields $HCHDT,<1>,<2>*hh <1> Heading relative to True North <2> T = True Default State Enabled. Transmitted twice per second. Notes This sentence may be enabled or disabled via the $PAMTC,EN,HDT command.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $WIMDA Summary NMEA 0183 standard Meteorological Composite. Syntax Fields $WIMDA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>, <12>,<13>,<14>,<15>,<16>,<17>,<18>,<19>,<20>*hh <1> Barometric pressure, inches of mercury, to the nearest 0.01 inch <2> I = inches of mercury <3> Barometric pressure, bars, to the nearest .
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Notes This sentence may be enabled or disabled via the $PAMTC,EN,MDA command. The barometric pressure provided in this sentence is the altimeter setting, which is the barometric pressure corrected for altitude above sea level. See the transmitted $YXXDR(A) sentence, and the received $PAMTC,ALT command, for further information.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $WIMWD Summary NMEA 0183 standard Wind Direction and Speed, with respect to north. Syntax Fields $WIMWD,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>*hh <1> Wind direction, 0.0 to 359.9 degrees True, to the nearest 0.1 degree <2> T = True <3> Wind direction, 0.0 to 359.9 degrees Magnetic, to the nearest 0.1 degree <4> M = Magnetic <5> Wind speed, knots, to the nearest 0.1 knot.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $WIMWV Summary NMEA 0183 standard Wind Speed and Angle, in relation to the centerline of the front of the vehicle. Syntax Fields $WIMWV,<1>,<2>,<3>,<4>,<5>*hh <1> Wind angle, 0.0 to 359.9 degrees, in relation to the centerline of the front of the vehicle, to the nearest 0.1 degree. If the data for this field is not valid, the field will be blank.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential To enable/disable the theoretical (true) form of this sentence, use the $PAMTC,EN,MWVT command. To enable/disable the relative (apparent) form, use the $PAMTC,EN,MWVR command.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPRMC Summary NMEA 0183 standard Recommended Minimum Specific GNSS Data. Syntax Fields $GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>, <9>,<10>,<11>,<12>*hh <1> UTC of position, in the form hhmmss <2> Status: A = Data Valid; V = Navigation Receiver Warning <3> Latitude, to the nearest .
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Notes This sentence may be enabled via the $PAMTC,EN,RMC command.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPVTG Summary NMEA 0183 standard Course Over Ground and Ground Speed. Syntax Fields $GPVTG,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh <1> Course Over Ground, degrees True, to the nearest 0.1 degree <2> T = True <3> Course Over Ground, degrees Magnetic, to the nearest 0.1 degree <4> M = Magnetic <5> Speed Over Ground, knots, to the nearest 0.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $WIVWR Summary NMEA 0183 Relative (Apparent) Wind Speed and Angle. For vehicle mounted instruments, wind angle is in relation to the vehicle’s heading, and wind speed measured relative to the moving vehicle. For stationary instruments, wind speed and angle are relative to the sensor.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $WIVWT Summary NMEA 0183 True wind angle in relation to the vessel’s heading, and true wind speed referenced to the water. True wind is the vector sum of the Relative (apparent) wind vector and the vessel’s velocity vector relative to the water along the heading line of the vessel.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $YXXDR Summary NMEA 0183 Transducer Measurements. Used in the LB150 WeatherStation to provide wind chill, heat index, barometric station pressure, and vehicle attitude (pitch and roll) data. For stationary instruments pitch and roll indicate the orientation in which the instrument was mounted.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential <13> P = pressure <14> Actual measured barometric pressure, or "station pressure", bars, to the nearest 0.001 bar <15> B = bars <16> STNP (ID indicating station pressure) The fields in the B version of the XDR sentence are as follows: <1> A = angular displacement <2> Pitch: oscillation of vehicle about its latitudinal axis. Front of the vehicle moving up is positive. Value reported to the nearest 0.1 degree.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential some reason the contents of a given set are not available, then the entire set (including commas) may be omitted. Because there are two versions of the XDR sentence, and because a group of four fields can be omitted entirely, it is necessary when parsing any XDR sentence to examine the field in each set of four fields in order to identify the meaning of the data in that set.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential NMEA 0183 TRANSMITTED SENTENCE $GPZDA Summary NMEA 0183 standard Time and Date. Syntax Fields $GPZDA,<1>,<2>,<3>,<4>,<5>,<6>*hh <1> UTC time of day, in the form hhmmss <2> UTC day, 01 to 31 <3> UTC month, 01 to 12 <4> UTC year (four digits, e.g. 2006) <5> Local time zone hours, 00 to +/-13 hrs <6> Local time zone minutes, 00 to +59 Default State Enabled. Transmitted once per second.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential 2.2. Received NMEA 0183 Sentences and Commands The LB150 WeatherStation has an NMEA 0183-compliant input channel that is capable of receiving standard NMEA sentences as well as proprietary commands for initialization, calibration, or to modify the behavior of the unit. All received sentences and commands can include or omit the NMEA checksum.
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LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $--HDG Summary NMEA 0183 standard Heading, Deviation and Variation. Syntax Fields Notes $--HDG,<1>,<2>,<3>,<4>,<5>*hh <1> Magnetic sensor heading, degrees. <2> Magnetic deviation, degrees east or west. <3> E if field <2> is degrees East W if field <2> is degrees West <4> Magnetic variation, degrees east or west.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $--HDT Summary NMEA 0183 standard Heading, True. Syntax Fields Notes $--HDT,<1>,<2>*hh <1> Magnetic sensor heading, degrees. <2> T = True. See section 2.2.1. for precedence rules regarding data received via this sentence.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $--VHW Summary NMEA 0183 standard Water Speed and Heading.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC Summary Prefix for recognized proprietary commands. Syntax Fields $PAMTC,<1>…*hh <1> Command mnemonic. This may be any of the following: ALT ATTOFF BAUD DATUM EN ERST HEATER OPTION POST QPS QV RESET SIM The number and meaning of any subsequent fields is dependent on the command mnemonic.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,ALT Summary Settings related to the altitude of the LB150. Syntax One of the following forms: $PAMTC,ALT,SET,<2>,<3>,<4>*hh $PAMTC,ALT,Q*hh Fields <2> Fixed altitude, -999.9 meters to +40,000.0 meters, to the nearest 0.1 meter.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential the barometric pressure altimeter setting provided in fields 1 and 3 of the transmitted $WIMDA sentence. Fields <3> and<4> of the $PAMTC,ALT,SET command define how to use the altitude setting provided in field <2>. All of the parameters of the $PAMTC,ALT,SET command are stored in nonvolatile EEPROM memory within the LB150, and so remain programmed even after cycling power.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,ATTOFF _NMEA 0183 RECEIVED SENTENCE_ Summary A set of proprietary commands to set and query the angular attitude offsets for the LB150 WeatherStation when mounted on a vehicle, and not necessary for stationary instruments.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential within the WeatherStation, and so remain programmed even after cycling power. If any of the fields <3>, <4>, or <5> are null fields, the corresponding stored value will remain unchanged. The $PAMTC,ATTOFF,Q command is used to query the values of the attitude offset angles currently programmed into the WeatherStation.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential 7. The programmed attitude offset values may be checked at any time by sending the command $PAMTC,ATTOFF,Q to the unit; it will reply with $PAMTR,ATTOFF,a,b,c.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,BAUD Summary Change the baud rate for both the transmitting and receiving NMEA 0183 channels. Syntax One of the following forms: $PAMTC,BAUD,4800*hh $PAMTC,BAUD,38400*hh Notes The $PAMTC,BAUD command may be used to increase the baud rate from the standard 4800 baud to 38400 baud.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP _NMEA 0183 RECEIVED SENTENCE_ Summary User calibration commands for the internal compass sensor. This can not be used for stationary instruments.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP,GO Summary Initiate a user calibration sequence for the internal compass sensor. Syntax $PAMTC,COMP,GO*hh The user calibration sequence for the LB150 is as follows: 1. The weather station is installed on the vehicle. The unit under test is powered up. 2. The $PAMTC,COMP,GO*hh command is sent to the weather station’s NMEA 0183 input channel to initiate user calibration mode. 3.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP,RESETALL Summary Reset the user calibration coefficients and damping control to the default values.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential where fields <1> through <9> contain the data from the weather station’s nonvolatile EEPROM, as defined in the “Q”, Query Command. $PAMTC,COMP,SET Summary Set one or more user compass calibration coefficients. Syntax $PAMTC,COMP,SET,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh where fields <1> through <9> contain the data to be set into the weather station’s nonvolatile EEPROM corresponding to the fields as follows.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP,Q Summary Query the weather station for the stored user compass calibration coefficients. Syntax Reply $PAMTC,COMP,Q*hh The weather station will reply with: $PAMTR,COMP,Q, <1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh where fields <1> through <9> contain the data from the weather station’s nonvolatile EEPROM corresponding to the fields as follows.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP,X Summary Terminate the user compass calibration mode. Syntax Reply Notes $PAMTC,COMP,X*hh $PAMTR,COMP,X, <1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh Upon receiving $PAMTC,COMP,X user calibration mode will be terminated, if it had been previously entered by a $PAMTC,COMP,GO. The reply will always be issued. If not in user calibration mode, the “X” will be replaced by “Q”.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,COMP,VERIFY Summary Verify the user compass calibration mode. Syntax $PAMTC,COMP,VERIFY*hh The verify user calibration sequence for the LB150 is as follows: 1. The weather station is installed on the vehicle. The unit under test is powered up. User calibration has been completed successfully. 2.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,DATUM _NMEA 0183 RECEIVED SENTENCE_ Summary Define the local datum to which GPS position locations are referenced.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential KGS, OHI-A, OHI-B, OHI-C, OHI-D, OHI-M, SIR, P90, and S85 are not currently supported by the GPS Engine used in the LB150, and therefore are not available for use as Local Datum. Important Note: Chart transformations based on IHO S60 parameters may result in significant positional errors when applied to chart data.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,EN Summary Enable or disable the periodic transmission of individual standard NMEA 0183 sentences, and specify their rate of transmission.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Notes The factory default settings are as follows: Sentence ID Enabled by default? DTM – GGA GLL – GSA – GSV – HDG – HDT MDA MWD – MWV (R) MWV (T) – RMC – VTG VWR – VWT – XDR (A) XDR (B) ZDA Default Transmission Interval 10 10 10 10 10 5 5 10 10 5 10 10 10 10 10 10 10 10 Note that the MWV sentence appears in two forms: relative (R) and theoretical (T). These two forms are enabled separately.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential The $PAMTC,EN,L command allows the settings to be reloaded from EEPROM to RAM without cycling power to the unit. This can be used to discard any changes made to the working copy in RAM, and restore the saved settings as though the unit had been turned off and then back on again. The $PAMTC,EN,LD command loads the factory default settings from ROM memory into RAM memory.
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LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,ERST Summary Reset the user portion of nonvolatile EEPROM to its factory default state. Syntax Notes $PAMTC,ERST*hh The following data items are saved in nonvolatile EEPROM within the LB150 WeatherStation. For each item, the default value, and the command used to change the value is shown. Item Default value Changed via command Azimuth offset 0.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,HEATER _NMEA 0183 RECEIVED SENTENCE_ Summary Control the internal heater within the weather station. Syntax Notes One of the following forms: $PAMTC,HEATER,0*hh Turn heater off (default state). $PAMTC,HEATER,A*hh Control heater automatically.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,OPTION _NMEA 0183 RECEIVED SENTENCE_ Summary Enable or disable certain WeatherStation features, or query their state.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Option 5: Notes <3> 5 = Enable Type 0 Messages <4> 0 = Ignore Type 0 messages for 60 seconds 1-39 = Enable Type 0 messages as data 255 = Ignore Type 0 messages (default) Option 1: If the local magnetic inclination (dip) is severe, this can produce errors in the compass heading when the vehicle is not level.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential The GPS receiver in the LB150 can calculate a position fix when it has achieved a lock on at least three GPS satellites. If it has achieved a lock on four or more satellites, the unit may be able to calculate a 3D position fix, meaning it can determine latitude, longitude, and altitude.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential The Wide Area Augmentation System (WAAS) uses a system of land based reference stations and geostationary satellites to augment the Global Positioning System (GPS) in order to provide additional accuracy, integrity, and availability. Several GPS Sentences are able to differentiate between WAAS (Differential) fixes and those fixes that do not use WAAS corrections.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,POST Summary Perform the Power-On Self Test.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential <17> = “PB200” string that indicates POST results are for the class of product described in this specification. Notes The various tests performed for the POST function are simple tests to determine if the hardware is minimally responding to software stimuli. The POST function should not be regarded as a comprehensive indicator that a given unit is healthy.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,QPS Summary Query part number and serial number information.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,QV Summary Query version information.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential $PAMTC,RESET _NMEA 0183 RECEIVED SENTENCE_ Summary Reset the LB150 WeatherStation. Syntax $PAMTC,RESET*hh The WeatherStation will reset as though power had been removed and reapplied. All settings will revert to their power-on defaults.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTC,SIM Summary Turn Simulate Mode On or Off. Syntax One of the following forms: $PAMTC,SIM,0*hh Turn Simulate Mode Off (default state). $PAMTC,SIM,1*hh Turn Simulate Mode On. $PAMTC,SIM,Q*hh Query Simulate state. The $PAMTC,SIM,Q command provides a query function to allow reading the current Simulate state.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential _NMEA 0183 RECEIVED SENTENCE_ $PAMTX Summary Suspend and resume transmission of NMEA sentences. Syntax Fields $PAMTX,<1>*hh <1> 0 = temporarily suspend transmission of all NMEA sentences. (default) 1 = resume transmission Notes Upon receiving this sentence, the LB150 WeatherStation will suspend transmission of all future NMEA sentences after the currently transmitting sentence has completed.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential 3. Revision History Revision 0.001 Date: Description: 7/6/06 Draft. Revision 0.002 Date: Description: 7/24/06 Draft. Revision 0.003 Date: Description: 7/31/06 Draft for Airmar internal review and comment. Revision 0.004 Date: Description: 9/16/06 Draft. Revision 0.005 Date: Description: 10/12/06 Draft. Revision 0.006 Date: Description: 3/7/07 Draft. Revision 0.007 Date: Description: 3/28/07 Draft. Revision 0.
LB150 WeatherStation Technical Manual revision 0.013 Proprietary and Confidential Revision 0.011 Date: Description: Revision 0.012 Date: Description: Revision 0.013 Date: Description: 03/24/08 Draft. Fixed version numbering and revised Compass User Calibration Sentence and PGN details. Added “damping” fields and resets. Compass User Cal INPROCESS changed to INPROGRESS. 04/10/08 Draft. Made Heater a Factory enabled option. Updated Wind References in Meteorological Data PGN.
