Stratospheric broadband airship designer Avealto works to close financing, says ITU gave HAPS unusable spectrum by Peter B. de Selding February 7, 2022 by Peter B. de Selding February 7, 2022 PARIS — Avealto Ltd., which since 2013 has been developing a stratospheric airship for a business… Read more 0 FacebookTwitterPinterestWhatsappEmail