Desired output of multi-flatten operation

desired-output.json

{"t":100.44380099679421,"v1":-3.2124876152877886,"v2":20.668968387311498}
{"t":200.7658959087325,"v1":-17.9729521628487,"v2":39.70574384652023}
{"t":301.6982003576183,"v1":-11.10212822944568,"v2":33.97732641377096}
{"t":402.02369599592936,"v1":-10.357254868666516,"v2":28.14680001787952}
{"t":500.361291107067,"v1":-15.358599092346992,"v2":24.449514473332897}
{"t":601.0570362962695,"v1":-18.17981637433697,"v2":36.90232317832954}
{"t":700.3591871348365,"v1":-4.184888093902327,"v2":43.63398291814092}
{"t":801.7683561318721,"v1":2.266724195547855,"v2":37.96260382309654}
{"t":901.3906331330202,"v1":1.8027188779133356,"v2":34.558440299721525}
{"t":998.8508331065062,"v1":-1.3711844607134631,"v2":34.518652181145356}
{"t":1097.1401685144158,"v1":5.5027134050661735,"v2":39.89433181166691}
{"t":1198.1819481032155,"v1":5.111544086242255,"v2":44.621036340105604}
{"t":1298.1931737425077,"v1":5.597833929076392,"v2":46.6957213571881}
{"t":1398.9874465151283,"v1":23.21742527898042,"v2":36.773578638699526}
{"t":1498.3317303744573,"v1":20.160346681365283,"v2":26.80096644321689}
{"t":1598.4807447946152,"v1":30.550780286448223,"v2":21.599906701835646}
{"t":1698.0002145693118,"v1":34.93977956699296,"v2":10.756461758216012}
{"t":1797.9744831102964,"v1":45.46302419790336,"v2":5.653617478117049}
{"t":1897.6625735596035,"v1":46.64157891931466,"v2":1.3696317908126634}
{"t":1997.4358456482016,"v1":41.843083899573664,"v2":3.0811366320972584}
{"t":2095.7887192910734,"v1":43.55268211367536,"v2":-2.3407775649362024}
{"t":2195.3246254215073,"v1":38.171095989436616,"v2":7.04803010458803}
{"t":2294.0727944630908,"v1":42.8250617855632,"v2":4.389220752964098}
{"t":2394.6254579929255,"v1":54.10059125671249,"v2":8.737428783776338}
{"t":2494.581050672933,"v1":56.56574015395961,"v2":12.882711513521645}
{"t":2594.2005144435193,"v1":63.49986000694103,"v2":-1.2386027633360985}
{"t":2692.756491441982,"v1":72.69418134916566,"v2":-7.249897309317803}
{"t":2792.588930609564,"v1":75.9247622041197,"v2":2.240515121812815}
{"t":2892.431789758766,"v1":76.96486919543473,"v2":4.558166385268954}
{"t":2991.699052074294,"v1":68.99979243538856,"v2":1.6023208458020295}