Hello,
I have a research paper in preparation but am uncertain whether I will have enough funds available to publish in the journal that I usually publish in (Radio Science). The topic is Ionospheric Tomography Using Signals of Opportunity.
What would be a reputable free alternative? I found Advances in Radio Science (ARS) but there is a limit on the length and my paper is currently about 10-16k words with 17-20 figures.
Best regards,
Alex