DD National

DD1 or DD national is the national channel of India. It celebrated golden jubilee on 15 September 2009. It started transmission on15 September 1959 as a part of All India Radio or Akashavani. The transmission was an experimental basis. The first transmission was one hour program per two days for a week. The regular transmission started in Delhi in 1965, in Mumbai 1972, in Kolkata1975 and in Chennai 1975. The programs in that time mainly based on agriculture, education and health programs. On 15 September 1976 India government started a new company named Doordarshan for television broadcasting. In 1982 Doordarshan transmit it first color signals to transmit Asian Games held in New Delhi. Now Doordarshan have 64 production center and 30 television channels.

DD1 or DD National is transmitting through different satellites. The parameters are given below.

Satellite Name	Band	LNB Frequency	Frequency	Symbol Rate	Polarization
Insat 2E @ 83 degree east	C	5150	4071	5000	Vertical
Insat 4B                 @ 93.5 degree east	C	5150	3725	27500	Horizontal
Insat 3C @ 74 degree east	C	5150	3778	6250	Horizontal
Insat 4B @ 93 degree east	Ku	9750	10990	27500	Vertical

Note: The logo used is the property of Doordarshan and may vary from the original logo. It used here for information only.