Add work on the OSNMA description

_posts/2024-07-11-osnma.md

@@ -147,6 +147,10 @@ The next field in the MACK message is Tags&Info, defined as a sequence of tags a
 
 The tags are obtained by generating a certain MAC, following the specific information within the Tag-Info field, and then truncating it (starting from the MSB) to the length defined by the Tag Size field within the DSM-KROOT of the chain in force.
 
+  ![MACK Tag-Info]({{ "/assets/images/MACK_tag_info.png" | relative_url }}){:width="250px"}{: .align-center .invert-colors}
+  *MACK message's Tag-Info field (from OSNMA SIS-ICD [^OSNMA-ICD]), where the $$ \text{PRN}_{D} $$ field identifies the satellite transmitting the navigation data which is authenticated by the tag.*
+  {: style="text-align: center;"}
+
 A possible example of received tag sequence, spanning two MACK messages, is:
 
 ```
@@ -209,4 +213,4 @@ The OSNMA service, in general, and the described GNSS-SDR integration, in partic
 
 [^Galan24]: A. Galan, I. Fernández-Hernández, W. De Wilde, S. Pollin, G. Seco-Granados, [Improving Galileo OSNMA Time To First Authenticated Fix](https://arxiv.org/pdf/2403.14739v1), arXiv, Mar 2024.
 
-[^Fernandez16]: I. Fernández-Hernández, V. Rijmen, G. Seco-Granados, J. Simón, I. Rodríguez and J. D. Calle, [A Navigation Message Authentication Proposal for the Galileo Open Service](https://www.researchgate.net/publication/283624748_A_Navigation_Message_Authentication_Proposal_for_the_Galileo_Open_Service), NAVIGATION, the Journal of the Institute of Navigation,  Vol. 63, No. 1, pp. 85-102, 2016.
+[^Fernandez16]: I. Fernández-Hernández, V. Rijmen, G. Seco-Granados, J. Simón, I. Rodríguez and J. D. Calle, [A Navigation Message Authentication Proposal for the Galileo Open Service](https://www.researchgate.net/publication/283624748_A_Navigation_Message_Authentication_Proposal_for_the_Galileo_Open_Service), NAVIGATION, the Journal of the Institute of Navigation, Vol. 63, no. 1, pp. 85-102, 2016.