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WASHINGTON: The U.S. Federal Aviation Administration (FAA) on Tuesday warned that interference from planned use of 5G wireless<\/a> spectrum posed an air safety risk and could result in flight diversions.
The aviation industry<\/a> and the FAA have raised concerns about potential interference of 5G<\/a> with sensitive aircraft electronics like radio altimeters. AT&T<\/a> and Verizon Communications<\/a> in November agreed to delay the commercial launch of C-band wireless service until Jan. 5 after the FAA raised concerns.
The FAA issued a pair of airworthiness directives ordering the revision of airplane and helicopter flight manuals to prohibit some operations requiring radio altimeter data when in the presence of 5G C-Band wireless broadband signals.
One FAA directive on Tuesday said the \"unsafe condition\" posed by the planned use required immediate action before the Jan. 5 deployment \"because radio altimeter anomalies that are undetected by the aircraft automation or pilot, particularly close to the ground ... could lead to loss of continued safe flight and landing.\"
The FAA reiterated in a statement on Tuesday that it believes the \"expansion of 5G and aviation will safely co-exist.\" The agency added that the two directives \"provide a framework ... to gather more information to avoid potential effects on aviation safety equipment.\"
The FAA remains in discussions with the Federal Communications Commission<\/a> (FCC), White House and industry officials about the precise contours of any limitations, which are expected to be outlined in the coming weeks in a series of notices.
The FCC said Tuesday it \"continues to make progress working with the FAA and private entities to advance the safe and swift deployment of 5G networks<\/a> ... We look forward to updated guidance from the FAA in the coming weeks that reflects these developments.\"
It is not yet clear what airports or specific airplanes may be impacted. The FAA said notices would \"be issued, as necessary, to state the specific areas where the data from a radio altimeter may be unreliable due to the presence of 5G C-Band wireless broadband signals.\"
AT&T and Verizon on Nov. 24 said they would adopt precautionary measures for at least six months to limit interference. But aviation industry groups said on Monday they were insufficient to address air safety concerns.
Verizon said Tuesday \"there is no evidence that 5G operations using C-band spectrum pose any risk to aviation safety, as the real-world experience in dozens of countries already using this spectrum for 5G confirms,\" and added it was confident the FAA ultimately will conclude C-Band 5G use \"poses no risk to air safety.\"
Verizon added it was \"on track to launch 5G using C-band next month and to reach 100 million Americans with this network in the first quarter of 2022.\"
The wireless companies said in November they would take \"additional steps to minimize energy coming from 5G base stations.\" The FAA said under 2020 FCC rules \"base stations in rural areas of the United States are permitted to emit at higher levels in comparison to other countries.\"
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美国警告5 g无线使用可能导致航班改道
航空工业和美国联邦航空局表示担忧的潜在干扰飞机电子像无线电测高计5 g敏感。AT&T和Verizon通信11月同意c波段无线服务的商业发射推迟到1月5日在美国联邦航空局表示担忧。
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华盛顿:美国联邦航空管理局(FAA)周二警告称,干扰计划使用5 g无线谱构成一个航空安全风险,并可能导致航班改道。
航空行业和美国联邦航空局表示担忧的潜在干扰5克与敏感的飞机电子像无线电测高计。美国电话电报公司(AT&T)和威瑞森通讯11月同意c波段无线服务的商业发射推迟到1月5日在美国联邦航空局表示担忧。
美国联邦航空局发布一条适航指令要求飞机和直升机的飞行手册的修订时禁止一些操作要求电台高度计数据的5 g c波段无线宽带信号。
一个联邦航空局指令周二表示,“不安全状态”计划提出的使用要求立即采取行动之前,1月5日部署”,因为无线电高度表异常未被发现的飞机自动化或飞行员,尤其是靠近地面……可能导致的损失持续安全飞行和降落。”
美国联邦航空局周二在一份声明中重申,它认为,“5 g的扩张和航空安全共存。”The agency added that the two directives "provide a framework ... to gather more information to avoid potential effects on aviation safety equipment."
美国联邦航空局仍在讨论联邦通信委员会(FCC),白宫和行业官员的精确轮廓任何限制,它预计将在未来几周在一系列的通知。
联邦通信委员会周二说它“继续取得进展与美国联邦航空局和私人实体合作,推进安全、迅速部署5 g网络…我们期待更新指导联邦航空局在未来几周反映这些发展。”
目前尚不清楚什么机场或特定的飞机可能会受到影响。联邦航空局表示通知将“签发,必要时,国家从无线电高度表的特定领域数据可能由于5 g的存在不可靠的c波段无线宽带信号。”
AT&T和Verizon 11月24日表示,他们将采取预防性措施限制干扰了至少6个月。但航空工业集团周一表示他们不足以解决航空安全问题。
Verizon周二说,“没有证据表明使用c波段光谱5 g操作对航空安全造成任何风险,几十个国家的现实世界的经验已经在使用这个频谱5 g证实,”并补充说有信心美国联邦航空局最终将得出结论c波段5 g使用“给航空安全造成任何威胁。”
威瑞森补充说这是“有望下月使用c波段发射5克,达到1亿的美国人在2022年第一季度这一网络。”
11月的无线公司表示他们将采取“额外措施减少能源来自5 g基站。”The FAA said under 2020 FCC rules "base stations in rural areas of the United States are permitted to emit at higher levels in comparison to other countries."
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