Officers expect to be in the area searching for Ebert until Friday, police say.
The 23-year-old mother-of-two has not been seen since earlier this month.
Her husband, Michael Burdon, shot and killed himself at their Mannahill property, northeast of Adelaide, on August 16 as police investigated her disappearance.
In the days after Burdon’s death, an extensive search was conducted on the 410 square-kilometre pastoral station but nothing was found.
The search included excavations in several areas, a ground sweep involving police and volunteers and a search from the air.
Burdon, 41, made no admissions and offered no clues as to the whereabouts of his wife before he took his own life.
But he remains the only suspect in her likely murder.
The last independent sighting of Ebert came on August 8 when she visited the SA Museum in Adelaide with her husband and two sons.
As the family drove back to Mannahill, Burdon told police she became agitated and got out of the car near Roseworthy, north of the city, and walked off.
However, he did not report her missing, with another family member contacting authorities two days later.
Ebert came to Australia from Germany several years ago and married her husband in February.