1. These two equations define gps positioning. Define the components of the equations and how they ultimately effect the different characteristic of carrier and code positioning. carrier= range + (ambig. x wavelength) + errors code = spd of light x (reception time-transmission time) =range + errors 2. What is multipath and how do you mitigate it?3. Ellipsoid and orthometric heights, and the geoid correction, define and compare. use a sketch.4. Why is there a difference between ground distances from a laser device versus GPS derived distances? What do you do about it? Explain with a diagram5. Define by equation, sketch or description these accuracy terms. (2 pts each)RMS2drmsCEPError ellipseSEP6. Define briefly these terms in relation to carrier differential GPS. Mention their relationship to accuracy also. Define these terms as they are used in the real GPS community. (2points each)Float positioningTriple differencingL3 Ionospheric free Fixed positioningWidelane7. Define briefly these terms in relation to code GPS. Mention their relative accuracy also. (Define these terms as they are used in the real GPS community.) (2 points each)Code positioningAutonomous positioningPseudorange positioningDGPSCarrier phase smoothed8. Define briefly: (1 pt each)Virtual benchmarkWAASDatumCoordinate systemWGS 84ITRFNAD83Satellite Mask angleEphemerisDOP9. Discuss the atmospheric effect on GPS positioning and what is done to correct for its effect.10. Why are the positions of the satellites different by 4 minutes every day?11. What factors would be taken into account on whether to do a code phase survey or a carrier phase survey?12. What is the practical relationship between the observation time ata roving station and baseline and accuracy with relation to the types of GPS surveying shown below. (How much time spent, forthe best accuracy). 2 pts each.RTKStop and Go OTF Post Processing (PP)STATICRapid StaticClassic