4 ms·

ISRO PSLV-C37 onboard camera showing 104 satellite separation

57 points by swatkat 10y ago

vivekv 10y ago
This is a fairly amazing video. I wonder what is the size of a nano satellite
- happy-go-lucky 10y ago
  A CubeSat (U-class spacecraft) is a type of miniaturized satellite for space research that is made up of multiples of 10×10×11.35 cm cubic units. CubeSats have a mass of no more than 1.33 kilograms per unit, and often use commercial off-the-shelf (COTS) components for their electronics and structure. The term "CubeSat" was coined to denote nanosatellites that adhere to the standards described in the CubeSat design specification. Source: https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat
- wmf 10y ago
  It's hard to find photos that give any size reference, but a 3U cubesat is about 3 liters of volume.
- swatkat 10y ago
  In this launch, there were "3U", "2U" and "1U" sized CubeSats[1]. 1U CubeSat is a 10x10x10 cm3 cube[2], "2U" is 20x10x10 cuboid and "3U" is 30x10x10 cuboid. [1] https://news.ycombinator.com/item?id=13650114 https://news.ycombinator.com/item?id=13650114 [2] https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat
captn3m0 10y ago
The Satellite separation starts at 1:23 or so, after the Third stage. 88 of the satellites (nanosats?) were by Planet.com and will be used for imaging as part of their Flock 3p: https://www.planet.com/pulse/record-breaking-88-satellites/ https://www.planet.com/pulse/record-breaking-88-satellites/ r/ISRO has the complete payload details: https://www.reddit.com/r/ISRO/comments/5t7a75/pslvc37_cartosat2d_mission_updates_and_discussion/ https://www.reddit.com/r/ISRO/comments/5t7a75/pslvc37_cartos...
swatkat 10y ago
Another slightly better quality video: https://www.youtube.com/watch?v=cvJYSmplzXc https://www.youtube.com/watch?v=cvJYSmplzXc
vermontdevil 10y ago
These cubesats are clustered closer than I thought they would be.
liotier 10y ago
I don't understand releasing them so close: isn't the whole point of a large number of satellites to give them different orbits ?
- sjburt 10y ago
  In the case of the Planet satellites, they will be spread out using differential drag over the next few months. https://arxiv.org/pdf/1509.03270.pdf https://arxiv.org/pdf/1509.03270.pdf
  - gokhan 10y ago
    Something like this? https://www.youtube.com/watch?v=nh0kJgHKeXo https://www.youtube.com/watch?v=nh0kJgHKeXo

57 points by swatkat 10y ago

vivekv 10y ago

This is a fairly amazing video. I wonder what is the size of a nano satellite

happy-go-lucky 10y ago
A CubeSat (U-class spacecraft) is a type of miniaturized satellite for space research that is made up of multiples of 10×10×11.35 cm cubic units. CubeSats have a mass of no more than 1.33 kilograms per unit, and often use commercial off-the-shelf (COTS) components for their electronics and structure. The term "CubeSat" was coined to denote nanosatellites that adhere to the standards described in the CubeSat design specification. Source: https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat
wmf 10y ago
It's hard to find photos that give any size reference, but a 3U cubesat is about 3 liters of volume.
swatkat 10y ago
In this launch, there were "3U", "2U" and "1U" sized CubeSats[1]. 1U CubeSat is a 10x10x10 cm3 cube[2], "2U" is 20x10x10 cuboid and "3U" is 30x10x10 cuboid. [1] https://news.ycombinator.com/item?id=13650114 https://news.ycombinator.com/item?id=13650114 [2] https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat

captn3m0 10y ago

The Satellite separation starts at 1:23 or so, after the Third stage. 88 of the satellites (nanosats?) were by Planet.com and will be used for imaging as part of their Flock 3p: https://www.planet.com/pulse/record-breaking-88-satellites/ https://www.planet.com/pulse/record-breaking-88-satellites/ r/ISRO has the complete payload details: https://www.reddit.com/r/ISRO/comments/5t7a75/pslvc37_cartosat2d_mission_updates_and_discussion/ https://www.reddit.com/r/ISRO/comments/5t7a75/pslvc37_cartos...

swatkat 10y ago

Another slightly better quality video: https://www.youtube.com/watch?v=cvJYSmplzXc https://www.youtube.com/watch?v=cvJYSmplzXc

vermontdevil 10y ago

These cubesats are clustered closer than I thought they would be.

liotier 10y ago

I don't understand releasing them so close: isn't the whole point of a large number of satellites to give them different orbits ?

sjburt 10y ago
In the case of the Planet satellites, they will be spread out using differential drag over the next few months. https://arxiv.org/pdf/1509.03270.pdf https://arxiv.org/pdf/1509.03270.pdf
- gokhan 10y ago
  Something like this? https://www.youtube.com/watch?v=nh0kJgHKeXo https://www.youtube.com/watch?v=nh0kJgHKeXo