Lab 3 GEOG2344 Report Template (1)

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School

Oklahoma State University *

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2344

Subject

Geography

Date

Apr 3, 2024

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docx

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Uploaded by GeneralThunder9165

GEOG 2344 Digital Tools for Environmental Problem-Solving Lab 3, week 4: GNSS Applications Name: Date of submission: 2/14/2024 Due date: Feb 14, 2024 at midnight Lab questions (Indent and provide an answer in a complete sentence) Question 1 How many GNSS satellites are currently being tracked by GNSS Planning Online? How many of them are considered healthy? I’m not sure if I searched correctly, but I see 138 total satellites were active and 17 are unhealthy. Question 2 How many Galileo satellites are currently active? I see that 18 were actuve Question 3 How many Beidou satellites are currently active? I see that 44 were active. Question 4 At what specific times of day are the maximum number of GPS satellites visible? What is this maximum number? Hint : You can use the time slider bar in the lower-right corner of the Number 1

of Satellites screen to give you the time that corresponds with a particular stack on the chart. These times are available in 10-minute intervals. Question 5 At what specific times of day are the minimum number of GPS satellites visible? What is this minimum number? Question 6 Which satellites are visible from Orlando at 6 a.m.? Hint : You can use the time slider bar to move the horizontal line to a particular time. You can also hover your mouse over a particular color bar to obtain the satellite number that goes along with that bar. G02, G01, GO3 GO9 G10 G11 G12 G13 G14 G15 G19 G20 G21 G23 G24 G25 G26 G27 G28 Question 7 Which satellites are visible from Orlando at 4:00 p.m.? Question 8 At what time(s) of day is the maximum value of geometric DOP (GDOP) encountered? What is this maximum value? Hint : You can again use the time slider bar to move the horizontal line to a particular time. You can also hover your mouse over a particular colored line to determine which type of DOP that line represents and get the time associated with it. Question 9 2

At what time(s) of day is the minimum value for geometric DOP encountered? What is this minimum DOP value? Question 10 Just based on the number of visible satellites and DOP calculations, what would be the “best” (i.e., peak) time range during which to perform GPS field measurements in Orlando, and why? Question 11 Just based on the number of visible satellites and DOP calculations, what would be the “worst” time range during which to perform GPS field measurements in Orlando, and why? Question 12 How many benchmarks are available in the database for this postal code? How many of them are located within 1 mile or less of the Orlando 32819 postal code? There are 123 benchmarks in the database and there are 6 located within a mile? Question 13 What are the coordinates of the benchmark closest to the origin of the postal code? N 28 27.468 W 081 28.444 3

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Lab 3 GEOG2344 Report Template (1)

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