Recent comments in /f/IAmA
ApeShifter t1_jd5q9eq wrote
Reply to comment by edave22 in I am Siobhan MacShane. I've been a Observatory Host at the Empire State Building since 2004. AMA. by EmpireStateBuilding
And it’s fun to say!
smoothpapaj t1_jd5pk5r wrote
Reply to I am Siobhan MacShane. I've been a Observatory Host at the Empire State Building since 2004. AMA. by EmpireStateBuilding
When they not only light it red on Valentine's Day, but also have it pulse like with a heartbeat, do you find it cute or disconcerting?
HiFiGuy197 t1_jd5ohfo wrote
Reply to comment by ihaveathingforyou in I am Siobhan MacShane. I've been a Observatory Host at the Empire State Building since 2004. AMA. by EmpireStateBuilding
The (2020) views from it look like this
NinjaMoreLikeANonja OP t1_jd5nrcw wrote
Reply to comment by obnoxygen in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Yes! There’s a ham radio on SBUDNIC. We tapped into the TinyGS network. Our specific module was the RFM96. This part of the mission failed. We also built two wide angle cameras into the front end of SBUDNIC, with the intent that we would transmit a couple potato vision quality images down from space over ham band. We tested the ever-living daylights out of that subsystem and- for reasons that will forever remain unknown- it just failed to work on orbit. We never actually heard a radio ping of any kind from SBUDNIC.
That being said, we know the satellite was alive- at least in the beginning- otherwise the sails would not have deployed.
We optimized for satellite lifetime rather than broadcast frequency. It’s totally possible that we were just never in the right place at the right time to catch SBUDNIC’s radio blast. It was set up to transmit every 10 minutes, for about a minute. The TinyGS network is pretty great, however we were broadcasting at 50mW so it was a VERY quiet signal even in the best of times. It’s not impossible- it’s been done before by other satellites- but it’s certainly challenging.
NinjaMoreLikeANonja OP t1_jd5mwxf wrote
Reply to comment by ITinMN in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Yeah…
And then Russia invaded Ukraine about 4 months after we filed the legal paperwork cementing the name in place.
The principle stays the same though- faster, cheaper, proof of concept.
NinjaMoreLikeANonja OP t1_jd5mr81 wrote
Reply to comment by CurlSagan in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Thanks! Mia Cross (miacross.com) did the art for us.
obnoxygen t1_jd5l990 wrote
hert3157 t1_jd5kfxx wrote
Reply to I am Siobhan MacShane. I've been a Observatory Host at the Empire State Building since 2004. AMA. by EmpireStateBuilding
Why does the Empire State pretend to not celebrate Columbus Day? You light up as the Italian flag
ITinMN t1_jd5ij7b wrote
CurlSagan t1_jd5idk9 wrote
Reply to comment by NinjaMoreLikeANonja in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
It's beautiful!
NinjaMoreLikeANonja OP t1_jd5hvt3 wrote
Reply to comment by CurlSagan in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Oh thanks! It was a fortunate stroke of collective creativity. We didn't come up with a potato, but we did come up with something cool.
CurlSagan t1_jd5gyrr wrote
Reply to Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
I just want to say that "SBUDNIC" is a fantastic name. Have you considered making a NASA-style arm patch for the mission? I'm picturing an orbiting potato.
Doomenor t1_jd5fxsg wrote
Reply to comment by NinjaMoreLikeANonja in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Wow that’s impressive
NinjaMoreLikeANonja OP t1_jd5fmii wrote
Reply to comment by NinjaMoreLikeANonja in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
Also, cube because cubes pack nicely. Small satellites are generally all described in matters of size as a multiple of 1U, which is a 10cm cube. So a 3U, like SBUDNIC, is 30x10x10cm.
NinjaMoreLikeANonja OP t1_jd5fe1c wrote
Reply to comment by Doomenor in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
There is actually atmosphere in space! The atmosphere never really ends, it just kinda slowly gets less and less dense. Technically, there's Earth atmosphere on the Moon, but it's just suuuuuuuuuper duuuuuuper basically-not-really-there. Also, the Sun spews hot space gasses at us constantly so there's drag from that too.
At 550km where SBUDNIC was initially deployed, there's very very little but- over the course of thousands of orbits- the drag adds up! It takes a long time.
dougola t1_jd5f1mu wrote
Reply to I am Siobhan MacShane. I've been a Observatory Host at the Empire State Building since 2004. AMA. by EmpireStateBuilding
How much time should I set aside for a proper tour of the building?
NinjaMoreLikeANonja OP t1_jd5exo7 wrote
Reply to comment by Pielord775 in Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
We are not the first people to do a drag sail by any means, so companies are already using this tech. The difference is that we did it faster and WAYYYYY cheaper than it's been done before, especially at the scale of a cubesat.
Our aerospace professor Rick Fleeter had access to a launch slot so 4 of us decided to spin up the project into something big. It grew from there into a team of 65+ plus students and engineers from across the world. All the engineering and fab was done at Brown by students; the multinational part of the team was our launch partner, D-Orbit, who provided a carrier satellite for the ride up to space.
Doomenor t1_jd5eh2i wrote
Reply to Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
How does a sail work in space where there is no atmosphere? Why a cube and not a sphere?
Pielord775 t1_jd5e82c wrote
Reply to Hi! I am the Chief Engineer of SBUDNIC, a 3U cubesat which is deorbiting itself via drag sail, AMA! by NinjaMoreLikeANonja
How long do you think it would take for companies to adopt this method? And what persuaded y’all start the project?
Afireonthesnow t1_jd5dqa2 wrote
Reply to comment by washingtonpost in I write The Washington Post’s Climate Coach column, where I help people figure out what they can do to help curb climate change. Ask me Anything! by washingtonpost
What are your thoughts on America really missing the transition from car centric communities to walk/bike/transit based communities in the distraction of electric cars?
Cars use a TON of energy. They are really really inefficient and the environmental impact of battery production is substantial..
I'm not promoting ICE vehicles either but I hope we can get to a country where a family has 1 or 2 cars instead of 2-4+ even in rural areas... Biking transit etc is just SO much better for land use, concrete production, energy power trip etc. I'm really frustrated that people think they are saving the planet by switching to an EV when they really aren't changing very much. The manufacturing of that EV is a lot of GHG emissions as well =\
[deleted] t1_jd59ltd wrote
washingtonpost OP t1_jd5948k wrote
Reply to comment by Baldbold192 in I write The Washington Post’s Climate Coach column, where I help people figure out what they can do to help curb climate change. Ask me Anything! by washingtonpost
It’s helpful to compare where the average person’s emissions come from. Housing is the top source (around a third) and transportation is next (around a third as well). For most people, those emissions vary dramatically. Frequent flyers, especially. Because plane travel is so energy intensive, it often contributes an outsize share of one's emissions.
So even if you drive every day for a commute, flying across the country several times could swamp those emissions. So there’s no one right answer to that except to say that a few long flights equals many, many miles in a car.
Unlikely-Zone21 t1_jd57ik3 wrote
Reply to I write The Washington Post’s Climate Coach column, where I help people figure out what they can do to help curb climate change. Ask me Anything! by washingtonpost
How do you feel about the tonnage of CO2 that is emitted from mining operations for electronic parts not being counted towards the "green"ness of various products, specifically EV cars obviously? I'm not talking about fossil fuel consumption for drilling and transport. I'm talking about recent studies done showing the insane amount of CO2 that is stored in the Earth that is being released due to the mining operations that currently does not go into those green calculations (ie I think it is if you drive an EV for 7 years and 60k miles it's better for the environment than the equivalent ICE vehicle).
washingtonpost OP t1_jd56qis wrote
Reply to comment by PeanutSalsa in I write The Washington Post’s Climate Coach column, where I help people figure out what they can do to help curb climate change. Ask me Anything! by washingtonpost
Recycling is the number one thing people say they do for climate change. And it’s great. For metals, glass, paper, and batteries in particular, you’re making an impact. But the questions is much less clear for single-use plastic (better to avoid). And other things are more important if you’re prioritizing.
As The Atlantic reports, when Project Drawdown, a nonprofit group, "analyzed more than 80 separate means that could help keep the world from passing the oft-cited threshold of 1.5 or 2 degrees Celsius of warming, the recycling industry’s projected contributions fell below the median, trailing geothermal power, efficient aviation, forest protection, and dozens of other actions."
MannyDantyla t1_jd5qwn5 wrote
Reply to I write The Washington Post’s Climate Coach column, where I help people figure out what they can do to help curb climate change. Ask me Anything! by washingtonpost
I want to use the tax breaks in the IRA law to get us a (free?) heat pump. But I don't know where to begin. Do I need to find a HVAC contractor that can help guide us through the process,or am I on my own? Or is there a service?
Also I think my partner's recent pay raise is going to put us over the threshold for getting the full benefit. How is that calculated? Is it based on your taxable income? And if so what year?
(BTW, thank you for doing this. The actions we make today will have a huge impact on the future generations.)