Version History
===============
Bundle Modification
Version Date Description
------- ------------ -----------------------------------------------
1.0 2017-11-22 This is the initial release of the MAVEN ROSE
Raw bundle. Coverage includes 2016-02-19 to
2017-06-27.
1.1 2018-04-16 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2017-08-15 to 2017-11-14.
1.2 2018-05-08 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2017-11-15 to 2018-02-14.
1.3 2018-08-16 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2018-02-15 to 2018-05-14.
1.4 2019-01-08 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2018-05-15 to 2018-08-14.
1.5 2019-02-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2018-08-15 to 2018-11-14.
1.6 2019-05-03 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2018-11-15 to 2019-02-14.
1.7 2019-08-07 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2019-02-15 to 2019-05-14.
1.8 2019-08-29 This version includes updated version of the
SIS and Overview Table documents.
1.9 2019-11-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2019-05-15 to 2019-08-14.
1.10 2020-02-14 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2019-08-15 to 2019-11-14.
1.11 2020-05-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the intial release
of data covering 2019-11-15 to 2020-02-14.
1.12 2020-08-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2020-02-15 to 2020-03-10.
1.13 2020-11-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2020-05-29 to 2020-08-14.
1.14 2021-02-12 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2020-08-15 to 2020-11-14.
1.15 2021-05-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2020-11-15 to 2020-12-09.
1.16 2021-08-11 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2021-03-26 to 2021-04-23.
1.17 2021-11-14 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2021-07-12 to 2021-08-14.
1.18 2022-02-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2021-08-15 to 2021-11-10.
1.19 2022-05-13 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2021-11-15 to 2021-12-27.
1.20 2022-08-11 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2022-02-22 to 2022-05-02.
1.21 2022-11-15 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2022-06-13 to 2022-08-11.
1.22 2023-02-10 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2022-08-15 to 2022-11-14.
1.23 2023-05-16 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2022-11-16 to 2023-02-13.
1.24 2023-08-11 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
of data covering 2023-02-16 to 2023-05-13.
1.25 2023-08-18 This is a release of new wea calibration files
for the MAVEN ROSE Raw bundle, with the new
files covering 2023-01-01 to 2023-07-09.
1.26 2023-11-16 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
files covering 2023-05-15 to 2023-07-10.
1.27 2024-02-15 This is an incremental release of the MAVEN
ROSE Raw bundle, including the initial release
files covering 2023-09-06 to 2023-11-10.
Bundle Description for the MAVEN ROSE Archive Bundle
====================================================
Overview
========
The MAVEN ROSE archive bundle includes data from the Radio Occultation
Science Experiment (ROSE) investigation on the Mars Atmosphere and
Volatile EvolutioN (MAVEN) spacecraft. The MAVEN mission and spacecraft
are described in the MAVEN mission and spacecraft description documents,
which are available in the MAVEN archive bundle. ROSE is a two-way,
single-frequency (X-band) radio occultation experiment designed to measure
electron density in the ionosphere of Mars. The ROSE investigation is
described in the MAVEN ROSE Software Interface Specification (SIS) which
is available in the document collections.
Data Collections
================
Data are provided in three different processing levels: raw, calibrated,
and derived. The original data recorded by the ground station during an
occultation are classified as raw data. The electron density profiles are
classified as derived data. Other data products are also provided. The
ROSE archive contains three bundles: rose.raw, rose.calibrated, and
rose.derived. The rose.raw bundle contains raw (Level 0) data files and
other files that are naturally associated with them. The other files are
not necessarily raw Level 0 files. The rose.calibrated bundle contains
calibrated (Level 2) data files. The rose.derived bundle contains derived
(Level 3) data files. All data products are outlined in the MAVEN ROSE
Software Interface Specification (SIS) which is available in the document
collections.
The SIS explains the relationships between different data products, which
is helpful for determining the number of high-level files associated with
a given low-level file. The electron density profiles are anticipated to
be the most widely-used data product. They are generated from time series
of frequency residuals. As discussed in the SIS, not all archived time
series of frequency residuals have yielded an archived electron density
profile. At the time of writing, 48 of 53 ingress frequency residuals have
yielded archived electron density profiles. Ingress occultations for a set
of proof-of-concept observations conducted on 2016-02-19, 2016-02-23, and
2016-02-26 did not extend to high altitudes due to unfavorable orbit
geometry. Consequently, the pre-occultation baseline is contaminated by
ionospheric effects. Ingress occultations on 2016-09-30 and 2017-02-28
were adversely affected by timing errors. Appropriate observations did not
begin until the ray path was below the ionosphere. At the time of writing,
none of the 39 egress frequency residuals have yielded archived electron
density profiles. Signal re-acquisition for the two-way egress
observations does not occur immediately after the ray path clears the
surface of Mars. Instead, the closest approach distance of the ray path is
generally near the 80 km altitude at which the refractivity changes from
being positive due to the neutral atmosphere to negative due to the
ionosphere. Since this transition is a critical part of the baseline
correction in the generation of electron density profiles, late
re-acquisition of the radio signal on egress occultations makes egress
observations challenging to process. The ROSE team is working to
generate electron density profiles from those time series of frequency
residuals that have not yet yielded archived electron density profiles.
Document Collections
====================
The document collections contain the MAVEN ROSE Software Interface
Specification (SIS), which includes a full description of the format and
content of some types of data products and a brief description of the ROSE
investigation. The document collections also contain detailed descriptions
of the format and content of some types of data products. Simple ASCII
data products are described in the SIS. More complicated data products,
which are generally standard outputs generated by the DSN during radio
science observations, are described in dedicated documents.
Context Collection
==================
The context collection contains pointers to the context information
including mission, spacecraft, instrument, and bundle descriptions.
XML_Schema Collection
=====================
The schema collection contains pointers to all schemas used to generate
the MAVEN ROSE bundle.
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