View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002755 | SkyChart | 1-Software | public | 24-08-19 08:45 | 24-08-19 13:27 |
| Reporter | Alvaro Lopez Antelo | Assigned To | Patrick Chevalley | ||
| Priority | normal | Severity | major | Reproducibility | always |
| Status | assigned | Resolution | open | ||
| Platform | PC | OS | Linux | OS Version | 64bit |
| Product Version | 4.3 beta | ||||
| Summary | 0002755: Unable to retrieve spice ephemeris for spacecraft JUICE | ||||
| Description | When trying to retrieve SPICE ephemeris for the JUICE spacecraft in order to see the fly by on Aug 20 2024 the telnet interface displays an error. I am using the latest beta version 4.3 beta 4876 | ||||
| Additional Information | Request SPK file for JUICE between 2024-08-19 and 2024-08-20 Start telnet session with ssd.jpl.nasa.gov:6775 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Unable to negotiate connection within 2 seconds. Defaults: TERM= vt102, ROWS= 9999, COLUMNS= 9999, ECHO on, FULL-DUPLEX Your terminal, command-line, telnet, or connection program may not be compliant with RFC 854 and RFC 1073 standards: http://tools.ietf.org/rfc/rfc854.txt http://tools.ietf.org/rfc/rfc1073.txt Using a different program to connect may solve the problem. -OR - The network may be slow and need > 2 seconds (try again). !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ====================================================================== | Jet Propulsion Laboratory | | | | * * * W A R N I N G * * * | | | | Property of the | | UNITED STATES GOVERNMENT | | | | This computer is funded by the United States Government and | | operated by the California Institute of Technology in support of | | ongoing U.S. Government programs and activities. If you are not | | authorized to access this system, disconnect now. Users of this | | system have no expectation of privacy. By continuing, you consent | | to your keystrokes and data content being monitored. | ====================================================================== [H[J ___ _____ ___ /_ /| /____/ \ /_ /| Horizons On-line Ephemeris System v4.98a | | | | __ \ /| | | | Solar System Dynamics Group ___| | | | |__) |/ | | |__ Jet Propulsion Laboratory /___| | | | ___/ | |/__ /| Pasadena, CA, USA |_____|/ |_|/ |_____|/ Establishing connection, stand-by ... [H[J JPL Horizons, version 4.98a Type '?' for brief help, '?!' for details, '-' for previous prompt, 'x' to exit System news updated April 3, 2024 Horizons> PAGE Output PAGING toggled OFF. Horizons> ##2 Horizons> "JUICE" ******************************************************************************* Revised: Aug 11, 2024 JUICE Spacecraft / Sun-Jupiter-Ganymede -28 https://sci.esa.int/web/juice The Jupiter Icy moons Explorer ("JUICE") is an ESA mission launched April 14, 2023 @ 12:14 UTC from French Guiana (ELA-3) on an Ariane 5. Its period and area of operations will overlap with NASA's Europa Clipper mission launching in 2024. PURPOSE The JUICE orbiter will investigate Ganymede and evaluate its potential to support life. Investigations of Europa and Callisto will compare these Galilean moons. The three moons are thought to have internal liquid water oceans, and are thought key to understanding the habitability of icy worlds. Main science objectives for Ganymede (and Callisto to lesser extent): * Characterize ocean layers & detect detect any subsurface water reservoirs * Topographical, geological and compositional mapping of surface * Study the physical properties of the icy crusts * Characterisation of internal mass distribution and dynamics * Investigate Ganymede's tenuous atmosphere * Study Ganymede's magnetic field and interactions with Jovian magnetosphere For Europa, the focus is on the chemistry essential to life. JUICE will also provide the first subsurface sounding of the moon, and determination of icy crust thickness over the most recently active regions. TRAJECTORY OVERVIEW: JUICE will have four gravity assist flybys of Venus and Earth and pass through the asteroid Main-Belt twice before arriving at Jupiter in July, 2031. There will be a Ganymede flyby 7.5 hours prior to Jupiter orbit insertion. The first Europa flyby will be in July 2032. The spacecraft will be placed in a high inclination orbit to allow exploration of Jupiter's polar regions and to study Jupiter's magnetosphere. In December 2034, the spacecraft will enter orbit around Ganymede, becoming the first spacecraft to orbit a moon other than Earth's. FLYBYS: 2024 Aug: Earth-Moon system (gravity-assist) 2025 Aug: Venus (gravity assist) 2026 Sep: Earth #2 (gravity assist) 2029 Jan: Earth #3 (gravity assist) 2029 Oct: Asteroid 223 Rosa [PROPOSED] 2031+ : more then 25 gravity assists, two Europa flybys PHYSICAL CHARACTERISTICS: * 3-axis stabilized * Power: solar panels, 85 m^2, 820W (EOM) * High-gain antenna: 2.5 m, body fixed * X- and Ka bands, downlink > 1.4 Gbit/day * Propulsion: bi-propellant main engine plus 10 thrusters Delta-V capability (2700 m/s, 0001400:0003000 kg of chemical propellant) * Radiation level: 240 krad /10 mm Al solid sphere * Dry mass at launch: 0000904:0001800 kg * Deployable appendages: 10.6 meter boom for JMAG and RPWI 16-meter antenna for radar Steerable medium gain antenna for comm and radio science SCIENCE INSTRUMENTS (11): * Jovis, Amorum ac Natorum Undique Scrutator (JANUS, camera system) * Moons and Jupiter Imaging Spectrometer (MAJIS, VIS/IR imaging spectrograph) * UV Imaging Spectrograph (UVS, UV imaging spectrograph) * Sub-millimeter Wave Instrument (SWI, spectrometer) * Ganymede Laser Altimeter (GALA) * Radar for Icy Moons Exploration (RIME, ice-penetrating 9 GHz, w/16m antenna) * JUICE-Magnetometer (J-MAG) * Particle Environment Package (PEP, suite of six sensors) * Radio and Plasma Wave Investigation (RPWI) * Gravity and Geophysics of Jupiter and Galilean Moons (3GM, Ka transponder) * Planetary Radio Interferometer and Doppler Experiment (PRIDE) TRAJECTORY: Post-launch trajectory from ESA based on tracking data through August 8, predicts after that. Name Start (TDB) Stop (TDB) -------------------------------------------------- ----------- ----------- juice_orbc_000069_230414_310721_v01 2023-Apr-14 2031-Jul-21 ******************************************************************************* Select ... [E]phemeris, [F]tp, [M]ail, [R]edisplay, ?, <cr>: Connection timed out | ||||
| Tags | No tags attached. | ||||
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This is unfortunately not possible because Horizon provide SPK file only for comet and asteroid. I need to specify that in the program text. It timeout because the last line "Select ... [E]phemeris, [F]tp, [M]ail, [R]edisplay, ?, " do not include the SPK choice. I look at the new Horizon API but it has the same limitation: "Binary SPK file generation is restricted to small-bodies only (asteroids and comets)." I think the only way is to use the data from the Horizon data table as it is described here: https://www.ap-i.net/skychart/en/documentation/display_of_neos#old_method_using_local_catalog And use the section "Retrieval of Horizons position data" Can you tell me if this work or if the documentation need to be updated for use with spacecraft data. |
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Thank you Patrick for the prompt response, I was able to download the SPICE ephemeris from ESA at https://www.cosmos.esa.int/web/spice/spice-for-juice and directly at https://spiftp.esac.esa.int/data/SPICE/JUICE/kernels/spk/ https://spiftp.esac.esa.int/data/SPICE/JUICE/kernels/spk/juice_orbc_000071_230414_310721_v01.bsp Is there a way to manually add the kernel to the catalogue? Meanwhile I will try the method suggested |
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Tried to use the manual method suggested, apparently the deep sky object catalog was creted from Horizons data correctly but I can't see the spacecraft on the chart at all |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 24-08-19 08:45 | Alvaro Lopez Antelo | New Issue | |
| 24-08-19 10:01 | Patrick Chevalley | Note Added: 0009022 | |
| 24-08-19 10:01 | Patrick Chevalley | Assigned To | => Patrick Chevalley |
| 24-08-19 10:01 | Patrick Chevalley | Status | new => feedback |
| 24-08-19 11:51 | Alvaro Lopez Antelo | Note Added: 0009023 | |
| 24-08-19 11:51 | Alvaro Lopez Antelo | Status | feedback => assigned |
| 24-08-19 13:27 | Alvaro Lopez Antelo | Note Added: 0009024 |
