Open and save
Contents
1. Solar Observation Survey Solar Observation The Solar Observation screen is used to compute the azimuth to an arbitrary backsight based on the position of a celestial body typically the sun WARNIN G Direct viewing of the sun without a proper filter will cause serious eye damage Pointing a total station directly toward the sun without a solar filter can also damage the EDM components Find Azimuth Using Ephemeris Data select this EYETAN ak cose method if you plan to enter data from an l E Select an Observation Method ephemeris A z 5 f Find Azi isi aris Data Find Azimuth Using Date and Time select this Find Azimuth Using Ephereris Data method if vou do not plan to use an ephemeris C Bird Azimuth Using Rate and Time Note The fields within the Solar Observations screen will vary depending on the method selected above All of the fields from each Settings clase method are described below ywduy oul Left Edge of Center Settings located at the top of the screen is a shortcut to the Date Time Settings screen Page Corrections Non Linear Declination 7 R 36 State Grid A Lat Long is the latitude and longitude of the GHAO 176 27599 Decii E total station These values can be scaled from a Gaga ire oag psceg Piz aces R map such as a U S G S 7 5 minute quadrangle 5 Solar Serni Diameter jo 16129 Aim selects the portion of the c2. the sun shot earlier You can also access Past Results from the ow J hotkey 113 114 Fill in the remaining fields with your current information and tap Solve Access the Survey Traverse Sideshot screen from the Main Menu or use the c R hotkey aim toward the backsight used during the solar observation zero your horizontal angle on the total station and tap either Gide Shot or Traverse The data collected should be aligned correctly with true north or vour local state plane coordinate system RRARARAAAAARAAAADAAALAALALALALatLs
3. be computed at the end of the routine r MM ery Date a c 1992 Note The hours to GMT will be between 5 and Hrs To GMT HH MM S5 sss Time 8 when in the continental United States E oa pos oo l oci Take Shot get Local Time 10 WITH A SOLAR FILTER INSTALLED aim ahead of the path of the sun so that the trailing edge has not yet contacted the vertical crosshair in the scope and tap to record the current horizontal angle 11 Watch the movement of the sun in the scope As soon as the trailing edge of the sun contacts the vertical crosshair either tap the button or use an external timepiece and note the precise time When using an external timepiece manually key in the noted time in the HH MM y SS sss fields Get local time now 12 Tap OK to continue You will return to the Solar Observation screen and the computed z azimuth for each shot taken is displayed with Mumber of sets sz Reverse shats Solar Observation other shot information Br aoimy UT Time pect 4 z e OF12 25 003 241943 Note You can delete and re shoot the last shot 2 J 07 13 241954 cae taken by selecting it and tapping the button 0S nse 07 13 39 002 2 This is useful if the last shot was in error i gyneed 13 If additional shots are remaining the next required shot will be selected Tap to access the Enter Shot Data screen to take the next shot 14 Repeat Steps 10 through 12 until all forward and reverse
4. bservation An accurate timepiece is critical when performing solar observations Two solar observation methods are available One method requires data taken from an ephemeris and the other method does not The example below illustrates performing a sun shot using ephemeris data since that method requires additional steps WARNING pirect viewing of the sun without a proper filter will cause serious eye damage Pointing a total station directly toward the sun without a solar filter can also damage the EDM components Performing a Sun Shot 1 Setup over a point with known or assumed Solar Observation coordinates and aim the total station at the Lat a7 e700 backsight point to where vou want to determine the azimuth Rim Left Edge of cen Long 98 3108 F ter Solar Observation 3 A dialog will open asking you to select an observation method For this example select SHA24 j1 6 26501 the Find Azimuth Using Ephemeris Data option and tap oK 110 Linear Declination 2 From the Main Menu select Survey Corractions Man State Grid Y Decl Decl24 12 03539 ARRRAERAAAAAAAAAAAAAARAAAARAAAAA AAO UVVUUVUUVUUVELELELEEDELEEPEEEERDEEE ESD J 4 Enter the latitude and longitude for your occupy point in the Lat and Long fields respectively Note Your latitude and longitude should have enough accuracy if it is scaled from a topographic map or measured us
5. efore the observations are deleted R 100 BAAAARAAALTLELLLLALATLADLALALALABABAL VUVUUEVUEVUEBEBEEEEELEBEEEEESERESESSEESE S The Enter Shot Data Dialog Box Enter Shot Data Backsight Direct ita DUML e000 13 22 43 Horizontal angle jonona Current Date Titre B Date Aa Time Hrs Te GMT HH LMM o Take Shot o Getlocal Time Horizontal Angle displavs the horizontal angle measured by the total station This value is updated with the Take Shot button described below GUT GO DE ey Current Date Time displays the current date 3 2x time and DUT These settings can be changed from the Date Time Settings screen Page R 36 92 Date if incorrect the current date should be entered here Time is where the precise time that the observation occurred is entered Hrs to GMT is the number of hours that the time at the current location differs from Greenwich Mean Time ake Shot records the horizontal angle from the total station Get Local Time fills in the Time field with the current time that is set in the data collector This function is not available when shooting the backsight Sun Shot Procedure Summary Point the telescope ahead of the path of the sun and lock the horizontal movement of the total station Immediately record the horizontal angle from the total station using the Take Shot button When the target becomes properly ali
6. elestial body that where you intend to aim You can select Left Edge of Center Center or Right Edge of Center sheet or collected with a handheld GPS unit R 98 SGAHRAAAATATRABAATLABADLALABLABLAERALABRAAAL Note Typically Left Edge of Center is selected when performing a sun shot in the northern hemisphere and Center is selected for star shots Corrections ok Corrections displays which corrections are T Norrtinear Declination Correction currently selected with an N for no or a Y for yes When tapped the Corrections dialog box opens correct toGrid T Use Zone Constant i s ae a where the following corrections are configured Center Meridian Zone Constant e K Non linear Declination Correction applies a correction for the linear interpolation of the declination of the sun for the time that an observation is taken This error is usually negligible but is removed when this is checked This should only be checked when performing sun shots e M Correct to State Grid when selected the computed azimuth is referenced from the local State Plane grid rather than true north e M Center Meridian Zone Constant these values are used to adjust the computed azimuth to the local State Plane grid Appendix A lists these values for the United States GHAO is the Greenwich Hour Angle of the sun at zero hour Universal Time Greenwich on the current date Decl0 is the declination of the sun at zero hour on the cu
7. gned with the crosshairs record the current time as accurately as possible The time can be automatically read from the data collector using the Get Local Time button or measured from an external time piece and manually entered in the appropriate fields When finished tap the button to complete the current observation R 101 When all observations are complete the Results page displays the computed azimuth to the backsight Results BS D A is the horizontal angle recorded to the backsight for the particular direct reverse observation Azi D R is the computed azimuth to the backsight for the particular direct reverse observation Avg is the computed average azimuth of the backsight relative to true north Grid Avg is the computed average azimuth of the backsight relative to the local State Plane grid This field is only displayed when a state grid correction is applied Note See the User s Manual for more information on the usage of the Solar Observation routine R 102 SQAEEAAAGAAADZAACAACLALALALZLAALAAAAA Solar Observations The Solar Observation screen is used to compute the azimuth to an arbitrary backsight based on the position of a celestial body typically the sun You can either use the time set in the system clock on the data collector or an external timepiece Whichever you choose you should calibrate it against Coordinated Universal Time shortly before performing the solar o
8. ing a handheld GPS unit 5 In the Aim field select the area of the celestial body where you plan to take your measurements For sun shots the trailing edge is usually used The left edge when in the northern hemisphere 6 Tap the button if the correction settings displaved to the right of the button need to be changed e If performing a sun shot check the Non Linear Declination Correction checkbox Leave it unchecked for star shots e Check the Correct to State Grid checkbox if vou want the computed azimuth corrected to align with the local state plane coordinate system Note The Central Meridian and Zone Constant values for the United States are provided in Appendix A of the Reference Manual 7 Refer to a current ephemeris and fill in the remaining five values When the screen is correctly filled in tap the Shots tab Note The GHAO and Decl0 values are read from the ephemeris for the current date The GHA24 and Decl24 values are listed in the ephemeris for the following day The semi diameter is in minutes and seconds so your value will look something like 0 16084 8 Tap the button to open the Enter Shot Data screen 111 9 Enter the correct hours to GMT in the Hrs To RIES PESTS o GMT field aim toward the backsight and tap Horizontal angle ooo oo to record the horizontal angle to 12 07 1999 gg 02 29 the backsight The azimuth to this point Current Date Tirse on BUT 1 0 will
9. rrent date GHA24 is the Greenwich Hour Angle of the sun at zero hour Universal Time Greenwich on the following day 24 hours later Decl24 is the declination of the sun at zero hour on the following day Solar Semi Diameter is the semi diameter of the sun expressed in minutes and seconds R 99 VBESEEEESESEESSESEESSSSESSSSSESESEEESESUS Shots Number of sets is the number of sets that will be taken to the celestial object Reverse Shots M When checked reverse shots will be required with each set When unchecked only direct shots are required Shoot accesses the Enter Shot Data screen described below where the shot data is entered for the selected observation Toss Incl will toggle the selected observation so that it will be hidden or un hidden respectively When an observation is hidden it will not be used when calculating the final azimuth Solar Observation grey lool 3 Dir BC te Vv oe v AUS fool ay i DS z S BF EE ee shoot_ pir pr Reset Note The buttons perform the same function as checking un checking the checkbox in front of each observation Note A backsight observation cannot be tossed Del permanently deletes the most current observation if it is selected allowing you to shoot that shot again Reset permanently deletes all observations A warning prompt will appear b
10. shots have been performed 15 After completing all shots you can scan down the list and view the computed azimuth for each one If any of the azimuths appear incorrect vou can have those shots excluded from the 112 ARARARARARARARARARAAARAARARARARTARARARAAA BS D Azi D Azi D Azi D BS R Tossed AZI R Azi R Avg computed average azimuth from all shots To exclude a particular shot select the shot and then either tap the checkbox next to the shot or the button You can include the shot again by selecting it and re checking the checkbox or tapping the button 0 00 00 353710 23 353 10 27 353 09 52 0 00 05 352 47 32 393 07 10 353 06 3 1 353 08 53 VELEEEE DEDEDE LELEDESEEERERBEEEDEU 16 Tap the tab to view the average computed azimuth to the selected backsight What to Do Next With the azimuth to the backsight known vou can now perform the following steps to begin your survey 1 Without moving from the occupy point used while performing the solar observation note the computed average azimuth from the Solar Observation Results screen 2 Access the Survey Backsight Setup screen from the Main Menu 3 Toggle the BS Point BS Direction button to BS Direction and enter the computed azimuth in that field Tip You can use the nd power button and select the Past results option to select and automatically enter the azimuth computed from
Download Pdf Manuals
Related Search