Garmin 76S and Spectrometer Use in the Field

Before Using a GPS to Collect Data Set up GPS with correct: – Map Datum – WGS 84 – Location Format – Decimal Degrees – Time Zone – Distance and other units (feet or meters) Think about what data you will collect and how you will name and record it – This unit is a simple unit and you will have to have a “log book” to go along with it to keep track of attributes for each waypoint

Contents of Box

Front of 76S – remove platics protective “cover”

Remove back cover by lifting and turn small “ring”

Install two AA Batteries and replace cover

Activating Unit the First Time – Go outdoors 1.Turn on unit - press red “light bulb” button 2.When “Accept” screen comes on press Page key to accept 3.Leave unit on as it acquires satellites and finds a location 4.Note number of satellites and regions of sky they are in

Use “Zoom” in and out buttons to look at current location

Setting Up Data Collection Properties 1)Press “Menu” 2)Use Toggle wheel and highlight Setup Map 3)Press Enter

Note there are Menu Tabs that you will go through to set up the unit: 1)You may want to go back and customize some of these later 2)Use Toggle Wheel and Enter button to move from Tab to Tab or within a Tab – Press Enter to select the item to change, then Toggle to correct option and press Enter again

Look at each item and change to your preferences.

Be sure to change to correct Time Zone for the place you will be collecting data

You can select feet or meters as you prefer for your Units

Location is a VERY important Tab 1)Change Location Format to Decimal Degrees – hddd.ddddd 2)Map Datum – WGS 84

Collecting a Waypoint 1)Press and hold down Menu button 2)Use “toggle wheel” to move to name of this Waypoint which is 001 3)Press Enter 4)Use toggle wheel on each letter to select a name for the location. 5)Press Enter when you have toggled to correct letter 6)When finished use toggle wheel to go to “OK” and then Press Enter That waypoint will now be named in your Units memory.

My Waypoint for Beatty

Saturday Field Trip We will collect waypoints at several SHORT stops on our way to Padre Island. Please be sure you do this at each stop and then write a short description for your Log Book We will be spending the major part of our time collecting field data on vegetation density in one location on Padre Island – This will include creating a “30 x 30” and a “60 x 60” meter test area

Back in the Lab - Monday BRING your GPS to the Lab – We will download your field trip data and create a simple map on top of the Corpus Christi remote sensed image. Look at your notes on spectral signatures and look at the location and size of the “pixel” you created with your GPS points. Does your spectral data concur with your visualization from the image of Padre Island?