Spacecrafts for Celestia

[gironde]

GRACE-FO1
GRACE-FO2


here : viewtopic.php?p=138785#p138785

[toutatis]

When will you guys make GRACE-FO satellite? How about the fictional Eris Explorer from Orbiter 2010?

Let's try... (Eris Explorer)

[toutatis]

Eris Explorer... from ORBITER for CELESTIA...

[Gurren Lagann]

Man, you made me happy!

EDIT: Now I'm waiting for its proposed Eris flyby route...

[toutatis]

Now I'm waiting for its proposed Eris flyby route...

There is still need to work with this model... smoothing some parts... but this work for 2 or 3 hours... I will start that tomorrow in evening after my work...

[Gurren Lagann]

There is still need to work with this model... smoothing some parts... but this work for 2 or 3 hours... I will start that tomorrow in evening after my work...

I'm looking forward for that! Now I don't need to take 3 hours to reach Eris!

[CM1215]

.........

Thanks! It looks much better now!

[DaveBowman2001]

Hmm...I have a question regarding the Eris Explorer: since it's an entirely fictional spacecraft, how would its trajectory will be projected?? Is it going to follow the trajectory its original maker has plotted in Orbiter??

Code: Select all

 THE ORIGINAL MAKER's TIMELINE of TRAJECTORY:
Eris Explorer
   2015 - Launched aboard a Delta IV-Heavy
   2018 - Flyby of Jupiter (40,000 km)
   2021 - Flyby of Saturn (377,000 km)
   2029 - Flyby of Neptune (30,000 km)   
   2057 - Flyby of Eris (3,000 km)

FUN FACT:
There's an Orbiter video on YouTube depicting the spacecraft's flight to Eris (made by Rseferino Orbiter Filmmaker)

Now I don't need to take 3 hours to reach Eris!

I feel your pain @Gurren Lagann, I barely made it to Jupiter myself

[Gurren Lagann]

Hmm...I have a question regarding the Eris Explorer: since it's an entirely fictional spacecraft, how would its trajectory will be projected?? Is it going to follow the trajectory its original maker has plotted in Orbiter??

Code: Select all

 THE ORIGINAL MAKER's TIMELINE of TRAJECTORY:
Eris Explorer
   2015 - Launched aboard a Delta IV-Heavy
   2018 - Flyby of Jupiter (40,000 km)
   2021 - Flyby of Saturn (377,000 km)
   2029 - Flyby of Neptune (30,000 km)   
   2057 - Flyby of Eris (3,000 km)

Maybe...

FUN FACT:
There's an Orbiter video on YouTube depicting the spacecraft's flight to Eris (made by Rseferino Orbiter Filmmaker)

Oh yeah that video... I watched it like 650 million times already... Its amazing...

[gironde]

great video ! What a dream !

[jujuapapa]

Hi,

today, new version of Tess probe (v1.1) of wieczor.

Find here : http://celestiaaddons.wixsite.com/celestiaaddons/stobjects

[gironde]

Hello,

I found this satellite of NASA: ACE or Advanced Composition Explorer. It was launched on 25-08-1997 by NASA to study the Sun. It was put into orbit at Point Lagrange L1.

The concern was to describe the orbit in the ssc file, since there is nothing on JPL's Horizons nor Norad's SatCat. Having a 3D model and not being able to install it in Celestia is frustrating!

I searched the internet to the bottom of the web pages talking about him.
It paid because I found this site, exclusively dedicated to ACE: http://www.srl.caltech.edu/ACE/ASC/orbit.html

I questioned the links of the site and found what I was looking for, an ephemeris from 25-08-1997 to 01-08-2018.


So here is the result:

[jujuapapa]

Hello,

I found this satellite of NASA: ACE or Advanced Composition Explorer. It was launched on 25-08-1997 by NASA to study the Sun. ...

Hi,

After downloading and installing ACE, I saw 2 problems :
No readme file for explanations, credits,...

None used texture by the model like in your picture ???

[gironde]

message sent to Croc about ACE's orbit

This is exactly what I explained last month in Lissajou's orbits at point L1.

the position file xyz provides the satellite positions during the defined period. In Celestia the assembly of all these points gives a curve around the Earth. If you accelerate the time with the panel7 (LUT5) you will see that the set starts to turn and that ACE follows this curve well but without ever moving away from L1 and without ever joining L2 even if the drawn curve passes by L2 which was there at another time. L1, L2, Ace, Moon, Earth continue to rotate relative to each other.

I know it's not the orbit but the curve of its positions. I tried to triturate the code to represent the orbit of ACE around the point L1 but without reaching it because the positions are given from the Earth and not from L1.

Maybe Toutatis will be able to improve the orbit code or the xyz file to change the point of origin. Knowing the position of the Earth, the position of L1, the position of ACE with respect to the Earth (the file xyz) can not we determine the position of ACE with respect to L1?

I found on https://en.wikibooks.org/wiki/Celestia/Trajectories#SpiceOrbit, a method using a Lua module to build a Lissajou orbit but without understanding much, advice to amateurs.

Added after 16 minutes 25 seconds:
ACE :

The model was on https://nasa3d.arc.nasa.gov/models
Author / Origin: Chris Meaney. NASA

the xyz file is from http://www.srl.caltech.edu/ACE/ASC/orbit.html (InfoUrl in the ssc file)

I tried several additions of textures but without result because none applies in Celestia. The original file (.lwo) did not contain any. I'm not good enough in 3D to solve this problem. Everyone can study the subject and propose a solution. Here we have a basic model that only needs to be improved in terms of aesthetics and orbit (Earth-L1).

Everyone to your keyboards !



Added after 17 minutes 51 seconds:
ACE :

here is representation of ACE's orbit :
http://www.srl.caltech.edu/ACE/ASC/DATA/browse-html/gse_color.html

Added after 14 minutes 40 seconds:
ACE :

here I use ACE_GSE_position.xyz.
the shape of the orbit seems fairer but is not centered at point L1. It seems to be 180 ° from point L1. ?????

[toutatis]

NOAA 19...

[Croc]

NOAA 19...

great!

[gironde]

beautiful retouching !

but
total length = 7.4m --> Radius 0.0037
( https://fr.wikipedia.org/wiki/NOAA_POES )

Technical characteristics [edit | change the code]
The NOAA POES satellites have a launch mass of 2,232 kg which includes 756 kg of propellant. The satellite includes a Star 37XFP apogee engine to circularize the orbit after separation from its launcher with a 42 kN solid propellant engine running for 51 seconds. Once in its final orbit the mass of the satellite is only 1,479 kg. The NOAA POES satellites are largely modified compared to the previous generation. To meet the energy needs of the instruments, solar panels provide 45% additional energy. All the equipment has been resized to cope with the increased capacity of this generation. The structure is reinforced to support the weight of the AMSU instrument. The three-axis stabilized platform uses a combination of Sun and Earth sensors to maintain orientation with an accuracy of 0.2 °. Orientation changes are made using reaction wheels and cold gas thrusters. The parallelepiped-shaped satellite body is 4.18 m long with a diameter of 1.88 m (overall length 7.4 m). A single wing 6,14 m long and 2,73 m wide. door solar panels that provide at least 833 Watts. The data collected is stored on 5 tape recorders with a unit capacity of 0.9 gigabits. From NOAA-17 part of the tape recorders is replaced by flash memory mass memories with a capacity of 2.7 gigabits1.

[toutatis]

JWST-A... (NASA)... another model... but work still continue... the orbit is false...

[toutatis]

..........

Added after 5 minutes 59 seconds:
the original model is the same as that was used by Wieczor... from NASA

Added after 4 minutes 49 seconds:
later I will correct some small problems of this model... I mean that in some a very small details need to correct something..

[gironde]

In a recent show on Discovery Chanel Sci, was broadcast a documentary about "Hubble Mission". In this program, they spoke at length about James Webb with 3D simulations. The telescope was pink below.