Guy warned several others, but not Joe Jr., who was killed in an explosion at the drilling site. At a Peyote ritual, Guy was warned not to go to work that day by a friend who had a premonitory vision. Leaphorn visits Tso's property, where he finds that his water supply has been contaminated - the helicopter is at the bottom of his reservoir with a dead body inside.įlashbacks reveal that Anna Atcitty was dating Leaphorn's son Joe Jr., who worked at an oil drilling site with her father Guy. Agent Whitover, who was responsible for planting Chee, believes the armored truck robbery was committed by a Navajo radical group called the Buffalo Society, and wants Chee to use the motel killings as a cover to investigate this lead on Navajo land. As Leaphorn begins his investigation, his department is joined by Deputy Jim Chee, who is in reality an undercover agent for the FBI. Leaphorn's deputy Bernadette Manuelito visits Sally's home, but is intimidated by her mother, a witch, and convinced the woman cursed her.
Leaphorn's wife Emma, a nurse, convinces him to investigate the living conditions of a pregnant girl named Sally Growing Thunder, who visited her clinic.
The medicine woman herself is blind, and in a catatonic state since witnessing the murders. Leaphorn has a personal history with Anna's family which he does not disclose to his colleagues. Lieutenant Joe Leaphorn of the Navajo Tribal Police investigates the murders Tso's body is mutilated, while Anna's body is unmarked. Three weeks later, Tso is found dead in a motel room along with Anna Atcitty, the granddaughter of a Medicine Woman he was visiting due to ailments since seeing the helicopter. The fleeing helicopter flies over the nearby Navajo reservation, where it is seen by an old man named Hosteen Tso. In Gallup, New Mexico, robbers pilot a helicopter to rob an armored truck, killing two guards. ( June 2022) ( Learn how and when to remove this template message) Please help improve them by removing unnecessary details and making them more concise. This section's plot summaries may be too long or excessively detailed. Noah Emmerich as Leland Whitover: A burned-out FBI agent whose career is dying.Rainn Wilson as Dan "Devoted Dan" DeMarco: A degenerate missionary who relies on his faith to recruit followers.Deanna Allison as Emma Leaphorn: Leaphorn's wife.Jessica Matten as Bernadette Manuelito: A Navajo police sergeant who is sharp as a tack and works closely with Leaphorn.The first season is primarily based on Listening Woman (1978) and parts of People of Darkness (1980).
We can see here that for detecting infrared radiation with wavelengths beyond $1\mu m$, materials with a smaller band gap than silicon are required.The series follows two Navajo police officers, Joe Leaphorn and Jim Chee, in the 1970s Southwest. It also shows corresponding maximum IR wavelengths that can be detected by sensors made out of these materials (cut-off column) and their typical operating temperatures The table below (copied from this presentation) shows band gaps for various materials used for IR detectors.
Therefore, in order to maintain a similar level of the dark current or similar signal to noise ratio, infrared CCD's require more cooling. The band gap of the light sensitive materials used in infrared CCD's is typically smaller than the band gap of the materials used in CCD's optimized for visible light, so that electrons making up photocurrent could be excited by low energy infrared photons.Ä«ecause of that difference, at any given temperature, infrared CCD's should have greater dark current - the current due to the temperature of the sensor rather than due to the received infrared radiation. So why isn't it that infrared instruments are used at a higher operating temperature than optical instruments? $$K_$ should be lower in total for infrared photons, making it harder for them to overcome the band gap.
This simple law tells us that the maximum kinetic energy of an ejected electron is the photon's energy minus the work function of the material, i.e. In charge-coupled devices (CCDs), doped semiconductors are used to produce an electronic signal from incoming photons - the underlying principle being the photoelectric effect.