Kristine M. Larson
@funwithgps.bsky.social
GPS and GNSS enthusiast, San Diego native, recovering aero engineering prof., environmental research (oceans,ice,snow,soil), open source https://github.com/kristinemlarson/gnssrefl
Reposted by Kristine M. Larson
Ripples in the Cretaceous Aguja Formation in Big Bend National Park. These formation is mostly composed of marine shales and mudstones but there are occasional sandstone layers that mark brief changes in depositional environment.
January 22, 2026 at 2:40 PM
Ripples in the Cretaceous Aguja Formation in Big Bend National Park. These formation is mostly composed of marine shales and mudstones but there are occasional sandstone layers that mark brief changes in depositional environment.
Reposted by Kristine M. Larson
Local reporting on Balboa Park parking continues to omit the fact that, combining both directions for routes 3, 7, 120, and 215, buses stop at Balboa Park:
- Weekdays: Every 1 minute and 52 seconds
- Saturdays: Every 2 minutes and 18 seconds
- Sundays: Every 2 minutes and 30 seconds
- Weekdays: Every 1 minute and 52 seconds
- Saturdays: Every 2 minutes and 18 seconds
- Sundays: Every 2 minutes and 30 seconds
January 21, 2026 at 8:35 PM
Local reporting on Balboa Park parking continues to omit the fact that, combining both directions for routes 3, 7, 120, and 215, buses stop at Balboa Park:
- Weekdays: Every 1 minute and 52 seconds
- Saturdays: Every 2 minutes and 18 seconds
- Sundays: Every 2 minutes and 30 seconds
- Weekdays: Every 1 minute and 52 seconds
- Saturdays: Every 2 minutes and 18 seconds
- Sundays: Every 2 minutes and 30 seconds
Reposted by Kristine M. Larson
San Diego peeps: @ridesd.org is doing a happy hour/panel with Green Drinks on oublic transit in the area. Good opportunity to touch grass and meet people interested in urbanism and decarbonization. luma.com/9d8th3jq
Public Transport with RideSD · Luma
Join San Diego Green Drinks and RideSD to kick-off another year of sustainability connections! We will be at Bivouac Adventure Lodge from 6-8pm and hear from…
luma.com
January 11, 2026 at 7:04 PM
San Diego peeps: @ridesd.org is doing a happy hour/panel with Green Drinks on oublic transit in the area. Good opportunity to touch grass and meet people interested in urbanism and decarbonization. luma.com/9d8th3jq
Senior citizen and teenager with a skateboard taking the 30 bus on Mission Blvd (San Diego)
January 12, 2026 at 2:02 AM
Senior citizen and teenager with a skateboard taking the 30 bus on Mission Blvd (San Diego)
Reposted by Kristine M. Larson
Immature Rufous Hummingbird @riceuniversity.bsky.social. These guys are getting ready to fly north for the summer, perhaps as far as Alaska. Before doing so, they need to replace some of their worn juvenile feathers. This one is still growing in its central tail feathers and inner primaries.
January 8, 2026 at 6:02 AM
Immature Rufous Hummingbird @riceuniversity.bsky.social. These guys are getting ready to fly north for the summer, perhaps as far as Alaska. Before doing so, they need to replace some of their worn juvenile feathers. This one is still growing in its central tail feathers and inner primaries.
Reposted by Kristine M. Larson
San Diego: Fashion Valley Transit Center is closed. This is the plan for the most severe Mission Valley flooding, so probably a good idea to avoid that area if you can.
January 1, 2026 at 6:39 PM
San Diego: Fashion Valley Transit Center is closed. This is the plan for the most severe Mission Valley flooding, so probably a good idea to avoid that area if you can.
Reposted by Kristine M. Larson
I spoke with @carlzimmer.com about our terminated grant on wildfire smoke and homes:
The @nytimes.com Lost Science series continues. Here's my Q&A with a scientist who was studying how wildfire smoke threatens human health when the EPA decided that her research was no longer a funding priority. Gift link: nyti.ms/4jhpw14
December 28, 2025 at 2:36 PM
I spoke with @carlzimmer.com about our terminated grant on wildfire smoke and homes:
Happy Holidays from Pacific Beach.
December 25, 2025 at 8:08 PM
Happy Holidays from Pacific Beach.
Reposted by Kristine M. Larson
Indigo Bunting (Passerina cyanea): This 13cm (5in) bird is native to the Americas. It winters in a range from South America to Florida, breeding from Florida up to southern Canada. It is a seed eating species. Terrific shot of this brilliant blue bird taken by Joe Povenz in the USA. #indigobunting
December 18, 2025 at 9:49 PM
Indigo Bunting (Passerina cyanea): This 13cm (5in) bird is native to the Americas. It winters in a range from South America to Florida, breeding from Florida up to southern Canada. It is a seed eating species. Terrific shot of this brilliant blue bird taken by Joe Povenz in the USA. #indigobunting
Reposted by Kristine M. Larson
Well, I tried waiting for blue skies and yellow ginkgo carpets on campus, but the Tule fog/stratus robbed me of that vision, so here’s the consolation view yesterday.
December 16, 2025 at 9:07 PM
Well, I tried waiting for blue skies and yellow ginkgo carpets on campus, but the Tule fog/stratus robbed me of that vision, so here’s the consolation view yesterday.
Low tide at Tourmaline Beach viewed from Bird Rock
December 10, 2025 at 2:22 AM
Low tide at Tourmaline Beach viewed from Bird Rock
Reposted by Kristine M. Larson
A Western Willet flying over me. In the fall, the Eastern Willets along the coast fly south to their wintering grounds and are replaced by Western Willets returning from the north. Willets are here year round, but the two species trade places every season. And yes, they are different species.
November 26, 2025 at 1:13 PM
A Western Willet flying over me. In the fall, the Eastern Willets along the coast fly south to their wintering grounds and are replaced by Western Willets returning from the north. Willets are here year round, but the two species trade places every season. And yes, they are different species.
Reposted by Kristine M. Larson
CVS phone AI just genuinely actually said "Villa Long Acting Jolla Drive".
If you fill a prescription at one CVS and then your doctor submits the next month to a different CVS (fun with supply chains), the website only lets you message the first CVS so you have to try to brute-force their AI phone tree just to leave a voicemail, which it really doesn’t want you to do.
November 20, 2025 at 10:11 PM
CVS phone AI just genuinely actually said "Villa Long Acting Jolla Drive".
View from Kate Sessions Park, San Diego
November 19, 2025 at 5:02 PM
View from Kate Sessions Park, San Diego
Reposted by Kristine M. Larson
After seemingly disappearing for 5 days, our Allen's Hummingbird @riceuniversity in Houston, TX has returned. Where did to go to all this time?
November 18, 2025 at 4:55 AM
After seemingly disappearing for 5 days, our Allen's Hummingbird @riceuniversity in Houston, TX has returned. Where did to go to all this time?
Reposted by Kristine M. Larson
Oslo i solnedgangen 2025-11-15
November 15, 2025 at 3:16 PM
Oslo i solnedgangen 2025-11-15
Reposted by Kristine M. Larson
November 15, 2025 at 7:58 AM
Reposted by Kristine M. Larson
Another Allen’s Hummingbird @riceuniversity.bsky.social in Houston. Amazing we’ve now had two. Our garden is working!
November 13, 2025 at 10:08 PM
Another Allen’s Hummingbird @riceuniversity.bsky.social in Houston. Amazing we’ve now had two. Our garden is working!
Reposted by Kristine M. Larson
Here in Houston @riceuniversity our soccer fields attract migrating meadowlarks in late October and early November. One might assume they are the expected Easterns but most have turned out to be Westerns. They r difficult to identify: subtle differences in face, tail and tertial patterns and vocals
November 6, 2025 at 8:11 PM
Here in Houston @riceuniversity our soccer fields attract migrating meadowlarks in late October and early November. One might assume they are the expected Easterns but most have turned out to be Westerns. They r difficult to identify: subtle differences in face, tail and tertial patterns and vocals
Reposted by Kristine M. Larson
This is well done.
October 31, 2025 at 5:25 PM
This is well done.
Reposted by Kristine M. Larson
Osprey
Mission Bay, San Diego
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
Mission Bay, San Diego
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
October 28, 2025 at 10:03 PM
Osprey
Mission Bay, San Diego
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
Mission Bay, San Diego
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
Reposted by Kristine M. Larson
Whimbrel and Marbled Godwit
La Jolla Shores
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
La Jolla Shores
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
October 24, 2025 at 6:18 PM
Whimbrel and Marbled Godwit
La Jolla Shores
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
La Jolla Shores
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #nature #birdsky
Reposted by Kristine M. Larson
Yellow-crowned Night Heron, juvenile
Ocean Beach, California
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #birdphotography #birdsky #nature
Ocean Beach, California
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #birdphotography #birdsky #nature
October 24, 2025 at 7:50 PM
Yellow-crowned Night Heron, juvenile
Ocean Beach, California
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #birdphotography #birdsky #nature
Ocean Beach, California
#photography #birds #naturephotography #wildlife #wildlifephotography #sandiego #birdphotography #birdsky #nature
To be fair, this isn't really a GPS antenna either. That is an antenna that someone sawed in half.
When you see photos of GPS stations, you’re usually looking at the protective radome cover and not the GPS antenna itself. The gray radome helps shield the antenna from rain, snow, and debris buildup and protects it against general wear.
October 21, 2025 at 4:17 PM
To be fair, this isn't really a GPS antenna either. That is an antenna that someone sawed in half.