Renée Mie Fredensborg Hansen

Postdoc at @DTUSpace with multi-frequency altimetry observations of sea ice 🛰️🧊❄️ Tweets are my own.

[Renée Mie Fredensborg Hansen @rmfredensborg]

Just in time for #Cryo2iceSymposium next week! Have a look at our preprint on cracking the snow code from altimetry using multi-frequency airborne observations along a dual-frequency near-coincident @esa_cryosat and @NASA_ICESat2 orbit! Marking also the last study of my PhD! 🛰

[The Cryosphere @EGU_TC]

Discussion open for comments on @EgUsphere: Exploring microwave penetration into snow on Antarctic summer sea ice along CryoSat-2 and ICESat-2 (CRYO2ICE) orbit from multi-frequency air- and spaceborne altimetry https://t.co/5nO8HY4hbB

[Renée Mie Fredensborg Hansen @rmfredensborg]

We've investigated the CryoVEx/DEFIANT Antarctic 2022/2023 campaign data for the CRYO2ICE sea ice under-flight on December 13 2022 over the Weddell Sea in our preprint: https://t.co/HWnXdy4h9w. Have a look, and let's discuss!

[ESA's CryoSat mission @esa_cryosat]

Airborne data from the ESA CryoVEx/DEFIANT Antarctic campaign of 2022/23 is now available on CS2EO!

Time to delve in 👇

‼️https://t.co/0sr2K4zbbO

[Earth Syst Sci Data @ESSD_journal]

Discussion open for comments: Dual-hemisphere sea ice thickness reference measurements from multiple data sources for evaluation and product inter-comparison of satellite altimetry https://t.co/AMkLZK9E3y

[ESA's CryoSat mission @esa_cryosat]

It was great to see @rmfredensborg present this at #Cryo2ice!

New preprint: "Exploring microwave penetration into snow on Antarctic summer sea ice along #CryoSat and ICESat-2 (CRYO2ICE) orbit from multi-frequency air- and spaceborne altimetry"

👉https://t.co/0EPStTI8uO

[Renée Mie Fredensborg Hansen @rmfredensborg]

This work could not have been possible with support form @esa @esa_cryosat and @DefiantNerc!

[Renée Mie Fredensborg Hansen @rmfredensborg]

Just in time for #Cryo2iceSymposium next week! Have a look at our preprint on cracking the snow code from altimetry using multi-frequency airborne observations along a dual-frequency near-coincident @esa_cryosat and @NASA_ICESat2 orbit! Marking also the last study of my PhD! 🛰

[The Cryosphere @EGU_TC]

Discussion open for comments on @EgUsphere: Exploring microwave penetration into snow on Antarctic summer sea ice along CryoSat-2 and ICESat-2 (CRYO2ICE) orbit from multi-frequency air- and spaceborne altimetry https://t.co/5nO8HY4hbB

[Renée Mie Fredensborg Hansen @rmfredensborg]

Suggestions going forwards? 1⃣ This is only one example of airborne data, we need to evaluate more to understand impact of different systems and sesonal signals! 2⃣ Modelling backscatter taking into account the differences between air- and spaceborne systems can provide insights!

[Renée Mie Fredensborg Hansen @rmfredensborg]

Excited for #CRISTAL? So are we! Take a look at our preprint investigating the potential for snow depth estimation from dual-frequency altimetry using current satellite missions, and get a taste of future expectations with simulations based on the design of #IRIS!

[Jack Landy @jclandy]

Take a look at our new preprint in @EGU_TC Anticipating CRISTAL: An exploration of multi-frequency satellite altimeter snow depth estimates over Arctic sea ice, 2018–2023 https://t.co/tvajNjg1fM @CIRFA_SFI @UiTNorgesarktis @Bristol_Glac @CPOM_news @DTUcryo @esa_cryosat @NASA_ICE

[Jack Landy @jclandy]

Take a look at our new preprint in @EGU_TC Anticipating CRISTAL: An exploration of multi-frequency satellite altimeter snow depth estimates over Arctic sea ice, 2018–2023 https://t.co/tvajNjg1fM @CIRFA_SFI @UiTNorgesarktis @Bristol_Glac @CPOM_news @DTUcryo @esa_cryosat @NASA_ICE

[Renée Mie Fredensborg Hansen @rmfredensborg]

@sthendric @dr_slfarrell @esa_cryosat @NASA_ICE @AWI_Media Indeed! Many different aspects to consider, especially for comparing between air- and spaceborne! 🛰

Iceland is treating us well, even though not everyone is here... Hopefully next year, we can all discuss even more radar and laser altimetry consolidation in person!

[Renée Mie Fredensborg Hansen @rmfredensborg]

@dr_slfarrell @esa_cryosat @NASA_ICE And other works using @AWI_Media #ICEBird with low-altitude flights too (https://t.co/ux4qrHtVCi) have shown #wavelets to overestimate and primarily capture thicker snow ❄️, so much still to learn with all these different retackers and where to track the interfaces!

[DTU Cryoshere @DTUcryo]

We join the 27th IAHR Int. Symp. on Ice in Gdánsk, Poland, this week. @rmfredensborg presented sea ice ridge statistics in Barents Sea and Fram Strait from #ICESat-2! 🛰️
Interesting discussions on deformed ice, offshore ice-ocean-structure, applications of remote sensing! ⛴️🧊❄️

[DTU Cryoshere @DTUcryo]

@hskourup and @rmfredensborg at ESA-ESRIN for the #St3TART-FO kick-off meeting! Exited to continue on the procedures for establishing fiducial reference measurements (#FRMs) for #Sentinel-3 Altimetry Cryo products 🛰, to support validation of altimetry sea ice variables ❄️🧊

[ESA's CryoSat mission @esa_cryosat]

This is just the sort of thing we're looking for at the #Cryo2ice symposium 🤩

"Arctic Freeboard and Snow Depth From Near‐Coincident CryoSat‐2 and ICESat‐2 (CRYO2ICE) Observations: A First Examination of Winter Sea Ice During 2020–2022"

👉https://t.co/x599oqdck3

[DTU Cryoshere @DTUcryo]

Paper celebration day! 📝 We may not be able to share the snacks with you, but we can definitely share our latest papers! Check out the links below if you're looking for some Sunday reading material.

Enjoy diving into the research! 📚

[Michel Tsamados @micheltsamados]

As a teaser here is the dream team earlier this week on the ice collected amazing in-situ, drone and airborne data. Photo credit: Thomas Newman (@ES_UCL).

[Renée Mie Fredensborg Hansen @rmfredensborg]

@alekpetty Thanks! You let me know if there's anything you want to discuss once you've had a look 😉 🤗

[Renée Mie Fredensborg Hansen @rmfredensborg]

❗️❗️❗️Are you as excited about the upcoming #ESA #CRISTAL mission and estimating snow depth from dual-frequency altimetry along the orbits as us? We've evaluated this possiblity - albeit from laser and radar - from Arctic #CRYO2ICE orbits for 2020-2022! ➡️https://t.co/Jfgehu4nSm