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One reason for routinely launching GPS satellites is simply "constellation replenishment," said Col. Andrew Menschner, deputy commander of the Space Force's Space Systems Command. Old satellites degrade and die, and new ones need to go up and replace them. At least 24 GPS satellites are needed for global coverage, and having additional satellites in the fleet can improve navigation precision. Today, there are 31 GPS satellites in operational service, flying more than 12,000 miles (20,000 kilometers) above the Earth.
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牛津經濟研究院（Oxford Economics）高級經濟學家鮑伯·施瓦茨（Bob Schwartz）表示，特朗普政府可能會利用其他可用的關稅工具——包括《貿易法》第122條下的替代性關稅——來避免支付大規模退款。
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