MESSENGER Radio Science Delta Differential One-way Ranging (DDOR) Data
Products Collection
Short Name:
mess_rs_raw_ddor
Date:
25 Apr 2025 01:58:59
Publisher:
Planetary Data System
Description:
DDOR files were generated in the TNF (TRK-2-34) format and contain
only TNF data type 10 records. The TNF collection in the MESSENGER
archive does not contain data type 10 records.
MESSENGER Radio Science Orbit Data File (ODF) Product Collection
Short Name:
mess_rs_raw_odf.
Date:
25 Apr 2025 02:01:10
Publisher:
Planetary Data System
Description:
This is the collection of Radio Science Orbit Data File (ODF) data
products acquired during the MESSENGER mission. These ODF files were
produced by the NASA/JPL Multi-Mission Navigation Radio Metric Data
Conditioning Team for use in determining spacecraft trajectories,
gravity fields affecting them, and radio propagation conditions.
MESSENGER Radio Science RSR Data Products Collection
Short Name:
mess_rs_raw_rsr.
Date:
25 Apr 2025 02:08:09
Publisher:
Planetary Data System
Description:
This is the collection of Radio Science Receiver (RSR) data products
acquired during the MESSENGER mission. RSR is a computer-controlled
open loop receiver that digitally records a spacecraft signal through
the use of analog to digital converters (ADCs) and up to four digital
filter sub-channels.
MESSENGER Radio Science Tracking and Navigation (TNF) Data Products
Collection
Short Name:
mess_rs_raw_tnf.
Date:
25 Apr 2025 01:58:35
Publisher:
Planetary Data System
Description:
This is the collection of Radio Science Tracking and Navigation (TNF)
data products acquired during the MESSENGER mission. Data were
originally stored as chronological records in DSN format TRK-2-34; but
they have been sorted according to data type (retaining chronological
order within each data type) during migration from PDS3 to PDS4.
TITAN is a computer program for calculating the interactions of a dilute plane-parallel medium with electromagnetic radiation. It includes all atomic processes: absorption, recombination, diffusion, excitation, deexcitation of atoms and ions, heating and cooling of the gas, and it solves the radiation transfer, in order to obtain the spectra reemitted by the medium. It handles plan parallel slabs in non LTE steady state, for various physical conditions and various illuminations, valid in many astrophysical situations. It is specifically designed for warm-hot (8000 to 10**8 K) and thick media (till an electron scattering optical depth of several tens) emitting and absorbing in the X-ray range (density from 10**5 to 10**14 cm-3). It computes the physical parameters, ionisation degrees, temperature, density, and the spectrum of the radiated light in each point of the slab, by solving simultaneously the ionisation equations, the equations of statistical equilibrium, the thermal equations and the radiation transfer, using iteration processes.
Decametric radio observation from Nancay decameter array. The Nancay Decameter Array (NDA) at the Station de Radioastronomie de Nancay (SRN) is a phased array of 144 "Teepee" helicoidal antenna, half of which being Right Handed (RH) polarized and the other half being Left Handed (LH) polarized. Four receivers are currently connected to the NDA, sampling data in spectral ranges within 5 to 80 MHz.
