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B-1. Thousands of satellites, such as the one shown in the image on the right, are in orbit above the earth - Leaving Cert DCG - Question B-1 - 2015
Question B-1
B-1. Thousands of satellites, such as the one shown in the image on the right, are in orbit above the earth. They are used for a variety of purposes including commun... show full transcript
Worked Solution & Example Answer:B-1. Thousands of satellites, such as the one shown in the image on the right, are in orbit above the earth - Leaving Cert DCG - Question B-1 - 2015
Step 1
Draw the given projections, clearly showing how the elliptical transmission area is located in plan.
Answer
- Begin by sketching the auxiliary view as provided in Fig. B-1, placing the satellite S at the center position.
- Next, indicate the beam angle of 30° towards the earth, ensuring to draw lines representing this beam clearly.
- From the center of the beam, sketch the edge of the transmission circle in the auxiliary view.
- Establish the minor and major axes in the auxiliary view by making sure the ellipse's dimensions reflect the beam's limits correctly.
- Finally, show additional points along the ellipse in the plan to complete the projection.
Step 2
Draw the outline of the transmission area in the elevation, including hidden detail.
Answer
- Start by identifying and establishing the points in elevation that correspond to the beam's transmission limits.
- Then, illustrate the concept of the elliptical transmission area in elevation, marking out the shape created by the circular outline transformed into an ellipse.
- Utilize a vertical section plane to determine visibility and illustrate how the ellipse extends at various points.
- Draw the required curve in elevation, ensuring it accurately represents the elliptical shape as derived in the plan view.
- Incorporate hidden details as needed, indicating where the shape interacts with the earth's surface beneath.