A father whose daughter died when Malaysia Airlines Flight 17 was shot down by a missile over eastern Ukraine said Tuesday's report by Dutch investigators on the tragedy brings "a bit of relief."

"[I] will never understand that my daughter disappeared — disappeared in the sky," Hans de Borst said in video interview from his home in The Hague with CBC's The National. "To get this detailed report helps to rationalize a small part of the story.

"We have a rational, three-kilo report now about detailed information [on] what really happened."

De Borst's daughter, 17-year-old Elsemiek, was a passenger on MH17 when it crashed in July 2014.  Soon after the tragedy, a grieving de Borst told CBC News, "She was my everything."

A missile launched from rebel-held Ukraine smashed into the Boeing 777, ripping off the cockpit, Dutch investigators reported Tuesday, adding that some passengers may have remained conscious for another minute or so as the airflow tore off their clothes and objects spinning through the cabin killed people in neighbouring seats.

The investigators said in their final report that the Buk missile that downed the plane exploded less than a metre from the cockpit, killing the two pilots and the purser inside in an instant and breaking off the front of the plane. While some of the passengers may have been conscious in the up to 90 seconds it took to hit the ground, they probably were not fully aware of what was happening amid the oxygen-starved, freezing chaos.

Father of MH17 victim reacts to report0:41

The tragedy that killed all 298 people aboard the flight from Amsterdam to Kuala Lumpur wouldn't have happened if the airspace of eastern Ukraine had been closed to passenger planes as fighting raged below, the Dutch Safety Board added.

"Our investigation showed that all parties regarded the conflict in eastern part of Ukraine from a military perspective. Nobody gave any thought of a possible threat to civil aviation," Safety Board chairman Tjibbe Joustra said.

The report did not consider who launched the missile. However, it identified an area of 320 square kilometres from which the launch must have taken place. All the territory within the area was in rebel separatist hands at the time of the crash, according to daily maps of fighting released by the Ukrainian National Security Council.

The Netherlands has headed the investigation into the disaster because 196 victims on the flight were Dutch, and Ukraine agreed to let the Netherlands take the lead role. It is also leading a separate criminal investigation into the crash.

Joustra said the 15-month investigation found the warhead was that used on a Buk surface-to-air missile system. Missile fragments found in the cockpit crew's bodies, as well as paint traces, enabled investigators to identify the Buk.

Ukraine and Western nations contend that the missile was launched by Russian-backed rebels, while Russia says if the plane was brought down by a missile, it must have been launched by Ukrainian government forces.

Not aware of missiles

Ukraine defended its decision not to close airspace in the eastern part of the country.

"No one at this time ... was even aware of the presence of highly sophisticated anti-air missile capabilities," Ukraine's Foreign Minister Pavlo Klimkin said during a trip to the United Nations, Reuters reported.

Klimkin praised the Dutch report as objective, "fully unbiased and transparent," and he said now the criminal investigation must show the chain of command and bring the perpetrators to justice.

Joustra said Russia had been given a chance to review the conclusions in advance, and added that it was not possible to determine the type of missile or warhead with certainty.

Dutch Prime Minister Mark Rutte called on Russia to fully co-operate with the criminal investigation into the downing of the plane. He said a key priority "is now tracking down and prosecuting the perpetrators." U.S. National Security Council spokesman Ned Price said the Dutch investigation was conducted in a professional manner and should serve as the basis for further investigation to identify those responsible for the downing of the aircraft.

Russian rejection

However, Russian deputy foreign minister Sergei Ryabkov said the "attempt to make a biased conclusion, in essence to carry out a political order, is obvious."

Russia in July vetoed a UN Security Council resolution to establish an international criminal tribunal to investigate the airliner's destruction. Russian Ambassador Vitaly Churkin said his country "seeks justice" but that the resolution was politically motivated.

The investigators unveiled a ghostly reconstruction of the forward section of MH17. Some of the nose, cockpit and business class of the Boeing 777 were rebuilt from fragments of the aircraft recovered from the crash scene and flown to Gilze-Rijen air base in southern Netherlands.

Canadian Foreign Affairs Minister Rob Nicholson commended the report Tuesday.

"We are committed to bringing those responsible for this horrific act to justice," he said in a statement.

There was one Canadian citizen aboard Flight MH17: Andrei Anghel, a 24-year-old medical student from Ajax, Ont. He had been studying in Romania and was flying from Amsterdam to Kuala Lumpur with his girlfriend, headed to Bali for a vacation.

On Tuesday in the village of Hrabove where the jet came down, Lyudmila Grigoryak — whose house was the closest to the crash site — brought red carnations to the field of dry grass where small pieces of the fuselage are still scattered.

Unlike a year and a half ago when heavy fighting was just nearby, the area is quiet and deserted. All the camouflaged rebels who were patrolling the area and manning the checkpoints are gone.

Hours before the report was released, the missile's Russian maker presented its own report trying to clear the separatists, and Russia itself, of any involvement in the disaster.

Almaz-Antey contended that its experiments — in one of which a Buk missile was detonated near the nose of an airplane similar to a 777 — contradict the conclusion that it was a Buk missile of the kind used by the Russians. It had earlier suggested that it could have been a model of Buk that is no longer in service with the Russian military but is part of the Ukrainian military arsenal.

It said the experiments also refute claims that the missile was fired from Snizhne, a village that was under rebel control. An Associated Press reporter saw a Buk missile system in that vicinity on the same day.

With files from Reuters, CBC News