William Shih Technology Director Scoring Procedures William Shih Technology Director 9 December 2018

Objectives Ensure fairness and consistency in calculating scores Provide transparency to team advisors and judges 9 December 2018

Cross-Country Starting Procedures Teams start each day at 9:00am and departing at preset intervals [Rule 8.1] On first day, teams draw for start order [Rule 11] On subsequent days, teams start based on previous days’ mileage [Rule 11] Each team is given 8 hours of racing time [Rule 8.3] Example: If the team leaves at 9:03am, they have until 5:03pm to complete the day Includes 15 minutes for rest stops and 30 minutes for lunch If teams are not ready at their starting time, their 8 hour timer starts, but must wait until all other teams have left [Rule 8.1, 11] 9 December 2018

Cross-Country Racing Procedures Teams given credit for all miles driven by solar car on the race route during the racing period May trailer solar car at any time, but will not receive credit for miles trailered No credit given for miles driven in solar car after 8 hours is complete No credit given for miles driven in solar car if not on official race route No credit given for miles driven in solar car when cars are required to trailer 9 December 2018

Scoring Program Judges will ride in front seat of chase vehicle Judges equipped with laptop loaded with scoring program Scoring program used to: Enforce race procedures/rules Eight hour timer – no events can be entered after eight hours complete Mandatory rest stop periods (15 minutes rest stop, 30 minutes lunch) Calculate unofficial race statistics Enter all events for calculating official results and auditing 9 December 2018

Scoring Program Screenshot 9 December 2018

Scoring “Events” Judges input events into program throughout day When the solar car enters the race course When team puts solar car onto trailer When team enters mandatory stops When team pulls off the side of the road to fix mechanical failures Each event associated with odometer from chase vehicle Used to determine credit given to solar car Used to calibrate each race segment 9 December 2018

Mileage Calibration Route is split into segments Segments start/end at known mile markers (e.g. rest stop, lunch stop, end of race) Teams’ miles are added up per segment Includes all miles on the route: Miles driven by solar car Miles trailered Each team’s miles are calibrated against published values for each segment Each segment is calibrated individually 9 December 2018

Calibration Example 0.0 Mile Markers in Race Route 108.4 Odometer Values Official Race Route Route Driven By Solar Car Route with Solar Car Trailered 108.4 0.0 114.5 START 122.7 Segment 1 (Start – Rest Stop) Odometer Delta = 14.3 Mile Marker Delta = 12.0 Calibration (Odo/MM) = 1.1917 Miles Driven = (114.5 – 108.4) / Calibration = 5.118 miles = 5.1 miles Miles Trailered = (122.7 – 114.5) / Calibration = 6.881 miles = 6.9 miles 12.0 REST STOP 126.7 128.0 138.9 25.5 Segment 2 (Rest Stop – Lunch) Odometer Delta = 16.2 Mile Marker Delta = 13.5 Calibration (Odo/MM) = 1.2000 Miles Driven (1) = (126.7 – 122.7) / Calibration = 3.333 miles = 3.3 miles Miles Trailered = (128.0 – 126.7) / Calibration = 1.083 miles = 1.1 miles Miles Driven (2) = (138.9 – 128.0) / Calibration = 9.083 miles = 9.1 miles LUNCH Segment 3 (Lunch – Finish) Odometer Delta = 20.6 Mile Marker Delta = 17.2 Calibration (Odo/MM) = 1.1977 Miles Driven = (159.5 – 138.9) / Calibration = 17.2 miles 159.5 42.7 FINISH 9 December 2018

Off-Course Scoring Teams may drive off the race route during the day No credit given for miles driven off-course Therefore, program must know where the team returned on-course When a team drives off-course, the team must inform the judge that they are off-course The judge will inform team to return back to last known mile marker Judge will enter the mile marker and the odometer value Program calculates what part of the drive was on-course and what was off-course 9 December 2018

Off-Course Calibration Example 0.0 Mile Markers in Race Route 108.4 Odometer Values Official Race Route Route Driven By Solar Car Route with Solar Car Trailered Route Driven Off-Course Route Trailered Back On-Course 108.4 0.0 114.5 136.0 13.0 START 122.7 12.0 REST STOP 128.0 Segment 2 (Rest Stop – Lunch) Previous Calibration Value = 1.1917 Calculate odometer where car went off-course: 122.7 + (13.0 – 12.0) X Prev. Calibration = 123.9 Invalid all miles between 123.9 and 136.0 Miles Driven (1) = 1.0 miles Miles Driven (2) = (140.0 – 136.0) / Prev. Calibration = 3.336 miles = 3.3 miles Trailered Miles = (142.0 – 140.0) / Prev. Calibration = 1.678 miles = 1.7 miles Miles Driven (3) = (151.0 – 142.0) / Prev. Calibration = 7.552 miles = 7.6 miles 142.0 151.0 140.0 25.5 LUNCH FINISH 9 December 2018

How Off-Course Affects Calibration The program estimates the portion driven on the route using previous calibration value and odometer Since previous calibration values are used to estimate position, the segment’s events cannot be used to calibrate Using estimated values to calculate the actual position would require multiple iterations Calibration values between segments should stay relatively stable 9 December 2018

Auditing All unofficial results from scoring program are audited Three race officials independently audit results: Race Auditor – Adam Monroe Technology Director – William Shih One additional intern/judge Results are announced in morning drivers’ meetings Once results are announced, they are uploaded to web site for public viewing Teams may protest results following procedure set in Rule 28 9 December 2018

Program Errors Program is written in Visual Basic and attempts to address all situations that may arise Sometimes, the program may crash during the day Race results are stored on laptop in a database and text file, allowing auditors to retrieve them at the end of the day Judges are equipped with pen/paper in case the program crashes Judges are in communication with the Race Technology Director and Race Technical Director to help resolve program issues 9 December 2018

Contact Information William Shih Technology Director 12711 Hadley Street #6 Whittier, California 90601 Cell: 626-688-9166 Work: 310-615-2497 Home: 562-696-8432 Email: wshih@mail.com Feel free to contact me any time if you have questions, comments, suggestions, etc. 9 December 2018