▁Since ▁there ▁is ▁freedom ▁to ▁choose ▁coordinate ▁systems ▁for ▁position , ▁a ▁state ▁vector ▁may ▁also ▁be ▁expressed ▁in ▁a ▁variety ▁of ▁coordinate ▁systems ▁( e . g . ▁the ▁North ▁east ▁down ▁coordinate ▁system ). ▁ ▁See ▁also ▁Or b ital ▁state ▁vectors ▁ ▁Category : Navigation <0x0A> </s> ▁Philip ▁H . ▁Mart iny ▁( 1 9 ▁May ▁ 1 8 5 8 ▁in ▁Als ace ▁– ▁ 1 9 2 7 ) ▁was ▁a ▁Franco - American ▁sculpt or ▁who ▁worked ▁in ▁the ▁Paris ▁at el ier ▁of ▁Eug ene ▁D ock , ▁where ▁he ▁became ▁for eman ▁before ▁em igr ating ▁to ▁New ▁York ▁in ▁ 1 8 7 8 — to ▁avoid ▁cons cription ▁in ▁the ▁French ▁army , ▁he ▁later ▁claimed . ▁In ▁the ▁United ▁States ▁he ▁found ▁work ▁with ▁August us ▁Saint - G aud ens , ▁with ▁whom ▁he ▁remained ▁five ▁years ; ▁a ▁fellow ▁worker ▁in ▁Saint - G aud ens ' ▁shop ▁was ▁Frederick ▁Mac M onn ies . ▁A ▁group ▁photograph ▁taken ▁in ▁Saint - G aud ens ' s ▁studio ▁about ▁ 1 8 8 3 , ▁conser ved ▁in ▁the ▁Archives ▁of ▁American ▁Art , ▁shows ▁Ken y on ▁C ox , ▁Richard ▁Watson ▁G ilder , ▁Mart iny , ▁Francis ▁Davis ▁Mil let , ▁ ▁Saint - G aud ens , ▁Julian ▁Ald en ▁We ir ▁and ▁Stan ford ▁White . ▁ ▁He ▁often ▁worked ▁in ▁co operation ▁with ▁architect s ▁in ▁Be aux - Ar ts ▁architecture . ▁He