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Kristine M. Larson @funwithgps.bsky.social · 23/06/2026

The view from Calumet Park yesterday (Bird Rock).

Brown pelicans flying along the San Diego coast.

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Kristine M. Larson @funwithgps.bsky.social · 02/05/2026

Tourmaline beach this afternoon, Pacific Beach.

Sand castle on the beach with ocean and Palm trees

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Kristine M. Larson @funwithgps.bsky.social · 19/03/2026

Osprey at Calumet Park in Bird Rock.

An osprey photographed from ~650 ft away.

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Kristine M. Larson @funwithgps.bsky.social · 20/02/2026

Why yes, use that leaf blower to remove water from the roof!

a leaf blower is being used to move water off a roof.

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Kristine M. Larson @funwithgps.bsky.social · 12/01/2026

Senior citizen and teenager with a skateboard taking the 30 bus on Mission Blvd (San Diego)

Older gentleman and teenager with skateboard sitting on the bus

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Kristine M. Larson @funwithgps.bsky.social · 25/12/2025

Happy Holidays from Pacific Beach.

Beach scene with a life guard station at night. Crystal Pier is lit up with white lights and a Christmas tree. San Diego

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Kristine M. Larson @funwithgps.bsky.social · 10/12/2025

Low tide at Tourmaline Beach viewed from Bird Rock

View of low tide, exposed rocks near Tourmaline in Pacific Beach, with surfers to the right.

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Kristine M. Larson @funwithgps.bsky.social · 19/11/2025

View from Kate Sessions Park, San Diego

View of San Diego and Mission Bay through trees from Kate Sessions park.

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Kristine M. Larson @funwithgps.bsky.social · 16/10/2025

Nothing to see here, just delivering a dinosaur in Solana Beach .

Dinosaur being delivered from a truck in Solana Beach

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Kristine M. Larson @funwithgps.bsky.social · 28/09/2025

Second step, eat 🍦 while walking home along the board walk.

Crystal Pier in Pacific Beach with the beach and crashing waves.

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Kristine M. Larson @funwithgps.bsky.social · 28/09/2025

First step, take my favorite 🚌 (30) to PB ice cream.

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Kristine M. Larson @funwithgps.bsky.social · 23/09/2025

NEW: Surface mass balance monitoring of an alpine glacier using GNSS Interferometric Reflectometry, Togaibekov et al. bit.ly/46ugyaI 🧪

Photograph of an alpine glacier, with elevation lines and locations of sensors (GNSS, stakes, automatic weather station).

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Kristine M. Larson @funwithgps.bsky.social · 22/09/2025

Trump baby cookies have made it to La Jolla.

Trump Baby cookies with cover up written on the diaper.

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Kristine M. Larson @funwithgps.bsky.social · 01/09/2025

My favorite sign at the protest today, downtown San Diego

San Diego Protestor with a sign saying „This is not a hard trolley problem.“

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Kristine M. Larson @funwithgps.bsky.social · 04/08/2025

Lovely visitor to our deck this weekend. Figeater beetle.

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Kristine M. Larson @funwithgps.bsky.social · 25/04/2025

Tulips in Keukenhof , the Netherlands

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Kristine M. Larson @funwithgps.bsky.social · 25/04/2025

Always nice to be in a country that knows how to spell my name 😀

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Kristine M. Larson @funwithgps.bsky.social · 13/12/2024

Normal day on the 30 bus in San Diego

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Kristine M. Larson @funwithgps.bsky.social · 12/12/2024

Sunset in North Pacific Beach tonight.

Sunset over the ocean with bright reds and yellows in San Diego tonight (Pacific Beach).

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Kristine M. Larson @funwithgps.bsky.social · 02/12/2024

From Tourmaline Beach last weekend.

View of the beach with a pattern made on the sand. Pacific Beach.

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Kristine M. Larson @funwithgps.bsky.social · 30/11/2024

We had beautiful weather for Thanksgiving - this was the sunset that night in Pacific Beach.

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Kristine M. Larson @funwithgps.bsky.social · 21/11/2024

To my SD followers, I grew up in PB (Kate Sessions, PBJH, MBHS), but moved to Colorado in 1990. I enjoyed Colorado, but honestly never saw the need for seasons. I've recently moved back to PB -and am enjoying living in the slow lane, getting around by walking, biking, and taking the bus/trolley.

View of the American and California/Surfing flag at Tourmaline Beach.

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Kristine M. Larson @funwithgps.bsky.social · 21/11/2024

Geodesists have definitely been tracking the rate of ground deformation in the southern US with GPS/GNSS. Not too many people in the US are using GPS/GNSS as a tide gauge though. A few years ago I did look at the signal from Hurricane Laura. agupubs.onlinelibrary.wiley.com/doi/full/10....

Hurricane Laura water levels measured with standard instruments (from NOAA), reflected GPS signals. Mapview of the eye of the storm is shown as an inset.

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Kristine M. Larson @funwithgps.bsky.social · 21/11/2024

I also maintain gnss-reflections.org - which has a link to the biggest and best compilation of tide gauge results using GNSS reflectometry (Simon Williams and PSMSL). You can also give a look to how the method can be used to measure soil moisture, snow accumulation, and vegetation water content.

Image of GNSS reflectometry links - from examples to github repository, and archives of snow, soil moisture, and tides measured around teh world.

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Kristine M. Larson @funwithgps.bsky.social · 21/11/2024

Can you use reflected GNSS signals to measure ice and surfaces? @icesheetmike.bsky.social Thomas Nylen and I summarized results in Greenland - tc.copernicus.org/articles/14/...

GPS sensor on a 16 meter pole at Summit Camp Greenland

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Kristine M. Larson @funwithgps.bsky.social · 21/11/2024

When I retired, I started building an open source software package (see my bio for the link) that takes GPS/GNSS signals that reflect off water/ice surfaces so you could use a traditional geodetic sensor as a tide gauge. This example is from Greenland. 🌊 and 🧪❄️

Photo of a GPS/GNSS sensor used to measure land motion at Qaqortoq, Greenland. Photo credit: DTU

tides measured over two weeks at Qaqortoq Greenland estimated using reflected GPS/GNSS signals.

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Kristine M. Larson @funwithgps.bsky.social · 16/11/2024

The Crystal Pier Hotel in PB is flying the Thin Blue Line. Not sure the constitution says that if you rent a room you get to fly a flag over a hotel... but when I asked that seemed to be their policy. en.wikipedia.org/wiki/Thin_bl...

Photo of Thin Blue Line flag flying over the Crystal Pier Hotel in Pacific Beach, California

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Kristine M. Larson @funwithgps.bsky.social · 11/11/2024

🌊 GNSS data can be used to measure tides and lake/river levels. Simon Williams will be giving a review talk on this topic in a few weeks. Sign up if you would to watch it live. Abstract can also be found at the site. bit.ly/3O4uyPG

Cartoon of geometry used to determine water levels using reflected GNSS signals.

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Kristine M. Larson @funwithgps.bsky.social · 08/11/2024

Mass balance and flux divergence on Gulkana Glacier derived using GNSS-IR and inexpensive GNSS sensors, from Albin Wells et al., paper link: bit.ly/3Aojv0F

New paper on Mass balance on Gulkana Glacier derived using GNSS-IR and inexpensive GNSS sensors

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Kristine M. Larson @funwithgps.bsky.social · 27/10/2024

Enjoyed Friday's IGPP Seminar about Water/Solid Earth Deformation/Seismicity given by Roland Bürgmann.

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Kristine M. Larson @funwithgps.bsky.social · 23/10/2024

Sunsets in San Diego have been nice this week!

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Kristine M. Larson @funwithgps.bsky.social · 25/09/2024

What can you do when all the traditional water sensors fail? This seminar shows how reflected GNSS signals were used to measure the flooding in southern Brazil last May. www.youtube.com/watch?v=8A6_...

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Kristine M. Larson @funwithgps.bsky.social · 04/09/2024

If you would like to learn more about GNSS reflections, think about watching Felipe Nievinski's upcoming seminar, Measuring a 100-year flood with GNSS-IR: the May 2024 catastrophic event in Brazil. Registration is here: bit.ly/3ZbnVSg . Questions should be directed to the host, Makan Karegar.

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Kristine M. Larson @funwithgps.bsky.social · 19/08/2024

A summary paper on the GNSS Interferometric Reflectometry open source software has been published in GPS Solutions. The paper is freely available. link.springer.com/article/10.1...

GNSS receiver being used to measure tides in southern Alaska.

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Kristine M. Larson @funwithgps.bsky.social · 25/07/2024

It's been a mere five years since the University of Tasmania put it in writing: I am not a VIP.

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Kristine M. Larson @funwithgps.bsky.social · 16/07/2024

Found a new GNSS-IR tide gauge - this one at Qaqortoq in southern Greenland. Works really well. gnss-reflections.org

photo of GNSS stations & sea level record measured by GNSS.

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Kristine M. Larson @funwithgps.bsky.social · 01/07/2024

Second foray into La Jolla by bike. Instead of providing bike parking this cafe seem to encourage you to park your bike inside.

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Kristine M. Larson @funwithgps.bsky.social · 15/06/2024

gotta give it to this commercial establishment in la jolla that made it easy for you to park your bike and pick up a shopping cart.

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Kristine M. Larson @funwithgps.bsky.social · 12/06/2024

I've been relearning the Pacific Beach way to spell and pronounce mineral names ...

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