McConaghy 2005 dissertation SnLm Earth-Mars broad-class cycler family seed

mcconaghy-2005-em-snlm-broadclass-family · source: literature · validation: V0

Signature

Bodies: E-M
Sequence (canonical): E-M
Sense: n/a
Period: — yr ( × E-M synodic)
Family-seed entry: the McConaghy 2005 dissertation enumerates the SnLm taxonomy where S = number of Earth-Mars synodic periods to repeat and L = number of intermediate Earth-Earth loops between successive Mars encounters. Members include S1L1 (k=2 synodic), S2L1 (k=2 synodic per Cases 1-3), S3L1 (k=3 synodic), S1L2 (k=2 synodic with 2 internal loops), and the "U0L1" / "U0L0" up- escalator branches. Per-member k and years are set on individual member entries (catalogue entries 3 'S1L1', 4 'Case 2', 5 'Case 3', 45 'Case 1', 46 'U0L1'); this family-seed carries the taxonomy attribution without per-member numerics.
Priority date: 2002-08-05

V∞ at encounters

E (#1): — (not published)
Family-seed entry: V_inf at Earth varies per SnLm member from ~2.5 km/s (Case 2 establishment) to ~12.6 km/s (U0L1 2:1(1)- establishment) per Rogers 2012 Tables 2-4. McConaghy 2005 dissertation tabulates per-member steady-state cycling V_inf; the dissertation full text was not accessible at ingest.
M (#2): — (not published)
Same — per-member; see McConaghy 2005 dissertation tables.

Orbit elements (heliocentric)

Semi-major axis a: — AU
Eccentricity e: —
Perihelion: — AU
Aphelion: — AU
Inclination: 0.00°

Family-seed entry: orbital elements vary per SnLm member from (a=1.17, e=0.193, peri=0.94, apo=1.40) for VISIT-1 to (a=2.05, e=0.563, peri=0.90, apo=3.20) for U0L1 per Rogers 2012 Table 1. Inclination 0.0 reflects the circular-coplanar modelling assumption used throughout the SnLm broad-class enumeration.

Primary citation

McConaghy, T. T. (2005). Design and optimization of interplanetary spacecraft trajectories. Ph.D. dissertation, School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana; ProQuest dissertation ID 3166673; Purdue e-Pubs identifier AAI3166673.

URL: https://docs.lib.purdue.edu/dissertations/AAI3166673/

Comprehensive open-access treatment of the SnLm Earth-Mars cycler taxonomy (advisor: James M. Longuski). The dissertation's first half covers low-thrust gravity-assist trajectory design and optimization (not catalogue-relevant); the second half covers Earth-Mars cyclers and subsumes the prior AIAA 2002-4420 broad- class paper plus the JSR 2004 Analysis of a Class follow-on.

Corroborating sources

McConaghy, T. T. et al. (2002). Analysis of a Broad Class of Earth-Mars Cycler Trajectories. AIAA/AAS Astrodynamics Specialist Conference, Monterey CA, 5-8 August 2002, AIAA 2002-4420. DOI: 10.2514/6.2002-4420
Conference precursor (3 years earlier than dissertation). Sets the priority_date for the SnLm broad-class concept. JPL repository record at hdl:2014/8886 (returned HTTP 500 at ingest); NTRS citation record at https://ntrs.nasa.gov/citations/20060029711 (no PDF download available; abstract metadata only).
McConaghy, T. T. & Longuski, J. M. (2004). Analysis of a Class of Earth-Mars Cycler Trajectories. Journal of Spacecraft and Rockets, Vol. 41, No. 6, pp. 1054-1056 (Engineering Note). DOI: 10.2514/1.11939
Journal version of the AIAA 2002-4420 broad-class enumeration; paywalled at AIAA (arc.aiaa.org returned HTTP 403).
McConaghy, T. T. et al. (2005). Towards a Standard Nomenclature for Earth-Mars Cycler Trajectories. Journal of Spacecraft and Rockets, Vol. 42, No. 4, pp. 694-698. DOI: 10.2514/1.8123
The standard-nomenclature paper that formalises the SnLm classification used in this catalogue (S = synodic periods, L = intermediate Earth-Earth loops). Russell 2004 dissertation cites this paper as ref [25] 'in press as of Russell 2004'. Paywalled at AIAA; nomenclature definitions sourced from Russell 2004 dissertation citation paragraph and from S1L1 catalogue-entry usage.
Byrnes, D. V. et al. (2002). Analysis of Various Two Synodic Period Earth-Mars Cycler Trajectories. AIAA/AAS Astrodynamics Specialist Conference, Monterey CA, 5-8 August 2002, AIAA 2002-4423. DOI: 10.2514/6.2002-4423
Companion paper at same conference; focuses on S2L1 family Cases 1-3. Already cited as first_published for the russell-ocampo-2.1.1+2-case2 and russell-ocampo-2.3.1+1-case3 entries above.
McConaghy, T. T. et al. (2006). Notable Two-Synodic-Period Earth-Mars Cycler. Journal of Spacecraft and Rockets, Vol. 43, No. 2, pp. 456-465. DOI: 10.2514/1.15215
Singles out one member of the S2L1 family for detailed study; the cycler is the 'Notable' two-synodic E-M with V_inf 4.7/5.0 km/s (catalogue entry 2 mcconaghy-2006-em-k2).
Chen, K. J. et al. (2005). Powered Earth-Mars Cycler with Three-Synodic-Period Repeat Time. Journal of Spacecraft and Rockets, Vol. 42, No. 5, pp. 921-927. DOI: 10.2514/1.11610
S3L1 family member but powered (low-thrust SEP), not strictly ballistic. Cited here for completeness of the SnLm family map. Strictly trajectory_regime = low-thrust = out of v1 paradigm per data/README.md and OUTSTANDING.md §H; recorded here only as corroborating reference to the SnLm taxonomy lineage, NOT as a separate ballistic catalogue entry.
Russell, R. P. (2004). Global Search and Optimization for Free-Return Earth-Mars Cyclers. Ph.D. dissertation, UT Austin. · link
Russell 2004 Table 3.4 cross-references several SnLm family members (Cases 2 and 3) to Russell's K.J.M+/-N nomenclature. The catalogue's russell-ocampo-* entries are the per-member records; this McConaghy 2005 family-seed records the SnLm taxonomy authoritative source.

Notes

Family-seed entry capturing the McConaghy 2005 dissertation as the authoritative open-access compendium of the SnLm broad-class Earth- Mars cycler taxonomy. Mirrors the pattern used for the 'jones-2017-vem-triple-family' (entry 11) and the Hernandez 2017 Jovian (entry 39) / Russell-Strange 2009 (entries 42, 43) family-seed records: one YAML entry per family with null per-member numerics, plus separate entries for individual members where those have been ingested with full numerics. SnLm TAXONOMY (per Russell 2004 dissertation citation paragraph and S1L1 entry context): S<n>L<m> where n = number of Earth-Mars synodic periods to repeat m = number of intermediate Earth-Earth phasing loops between successive Mars encounters Prefix U / D marks the up-escalator (outbound, post-Earth-flyby vehicle headed to Mars) vs. down-escalator (inbound, post-Mars- flyby vehicle headed to Earth) branch. The standard nomenclature paper (McConaghy/Russell/Longuski 2005, DOI 10.2514/1.8123, JSR Vol. 42 No. 4) is the authoritative definition; that paper was not directly consulted at ingest (AIAA 403). MEMBER MAP (cross-references to per-member catalogue entries): | SnLm | Per-member catalogue entry | Source attribution | |-------|---------------------------------------------------|--------------------------------------------------| | S1L1 | entry 3 s1l1-2syn-em-cpom | McConaghy/Longuski/Byrnes 2002 AIAA 2002-4420 | | S2L1 | entry 4 russell-ocampo-2.1.1+2-case2 (Case 2) | Byrnes/McConaghy/Longuski 2002 AIAA 2002-4423 | | S2L1 | entry 5 russell-ocampo-2.3.1+1-case3 (Case 3) | Byrnes/McConaghy/Longuski 2002 AIAA 2002-4423 | | S2L1 | entry 2 mcconaghy-2006-em-k2 (Notable) | McConaghy/Landau/Yam/Longuski 2006 JSR | | S2L1 | entry 45 mcconaghy-2005-em-case1 (Case 1) | McConaghy/Longuski/Byrnes 2002 AIAA 2002-4420 | | U0L1 | entry 46 mcconaghy-2005-em-u0l1 | McConaghy/Longuski/Byrnes 2002 AIAA 2002-4420 | | S3L1 | (powered, OUTSIDE v1 paradigm — Chen et al. 2005) | Chen/Landau/McConaghy/Okutsu/Longuski/Aldrin | | S1L2 | (not yet ingested; member numerics not located) | McConaghy 2005 dissertation | The S3L1 ballistic and S1L2 families are presumed catalogued in the McConaghy 2005 dissertation but per-member numerics were not located in the secondary sources accessible at ingest (Rogers 2012 Table 1 does not list S3L1 / S1L2 ballistic rows; the Chen et al. 2005 three-synodic paper is explicitly powered/low-thrust). When the dissertation full text becomes accessible, backfill per-member entries for S3L1-ballistic and S1L2 in the same id-naming convention used for entries 45-46 (mcconaghy-2005-em-<snlm>). DATA COMPLETENESS: citation-only family seed (parallel to entries 11, 39, 42, 43). Numerical values are null because this is the family-level record; per-member numerics live on the individual SnLm entries listed in the member map above. M7 NOTE: M7 matcher should treat this family-seed entry as a "family attribution placeholder" — finder hits matching any of the enumerated per-member entries above attribute to McConaghy/Longuski/ Byrnes 2002 (priority_date 2002-08-05) via the per-member's first_published, NOT via this family-seed (which would otherwise risk over-broad attribution). The family-seed exists primarily to preserve the McConaghy 2005 dissertation citation for future ingest when the dissertation full text becomes accessible.

Source quotes (per-field provenance)

Every numerical value in this entry traces to a verbatim or paraphrased quote from a cited source.

first_published.title: ProQuest dissertation record AAI3166673; Purdue e-Pubs page https://docs.lib.purdue.edu/dissertations/AAI3166673/ confirms title "Design and optimization of interplanetary spacecraft trajectories", author Thomas Troy McConaghy. Per the e-Pubs abstract (retrieved via Google search snippet): "describes advances in methods to design and optimize interplanetary spacecraft trajectories, particularly for missions using gravity- assist maneuvers or low-thrust engines (or both). The first part of the dissertation describes a new, efficient, two-step methodology to design and optimize low-thrust gravity-assist trajectories ... a 3.7-year Earth-Venus-Earth-Mars-Jupiter flyby trajectory with maximized final mass." The Earth-Mars cycler taxonomy is treated in the second half of the dissertation.
first_published.venue: Purdue University School of Aeronautics and Astronautics PhD dissertation, 2005; advisor James M. Longuski. ProQuest dissertation ID 3166673; Purdue e-Pubs identifier AAI3166673.
corroborating_sources[0].title: AIAA 2002-4420 conference paper, "Analysis of a Broad Class of Earth-Mars Cycler Trajectories", McConaghy/Longuski/Byrnes, presented at the AIAA/AAS Astrodynamics Specialist Conference, Monterey CA, 5-8 August 2002. Conference proceedings DOI 10.2514/6.2002-4420; JPL repository hdl:2014/8886 (HTTP 500 at ingest); NTRS citation https://ntrs.nasa.gov/citations/20060029711 (no downloads available). Russell 2004 dissertation cites as ref [17].
corroborating_sources[2].title: McConaghy/Russell/Longuski 2005 JSR Vol. 42 No. 4 pp. 694-698 "Towards a Standard Nomenclature for Earth-Mars Cycler Trajectories" (DOI 10.2514/1.8123) — the formal definition paper for the SnLm classification used throughout this catalogue. Paywalled at AIAA; cited per Russell 2004 reference [25] ("McConaghy, T. T., Russell, R. P., and Longuski, J. M., 'Toward a Standard Nomenclature for Earth-Mars Cycler Trajectories', JSR, in press") and per S1L1 catalogue entry 3.
notes: SnLm taxonomy interpretation (S = synodic count, L = intermediate Earth-Earth loop count, U/D prefix = up/down escalator) is the convention adopted by McConaghy/Russell/Longuski 2005 JSR and used throughout subsequent literature including the Rogers 2012 AIAA 2012-4746 establishment-cycler paper (Table 1 explicitly lists S1L1 and U0L1 alongside the named Case 1, Case 2, Case 3 members of the S2L1 family).