From the SKYREPORT visit: www.skyreport.com   EchoStar detailed its second quarter performance in a filing the company made with the Securities and Exchange Commission late Thursday, including a jump in subscribers that didn't quite match last year's 2Q efforts.   The company said its DISH Network service added about 170,000 net new subscribers during the three-month period, taking its total to 13.585 million. That compares to about 195,000 net additions for the same period last year. EchoStar attributed the lower net subscriber gain to a number of factors, one of them being seasonality. Typically, subscribers churn at a higher rate during the second and third quarters each year than during the first and fourth quarters, the company said. As for financials, EchoStar said second quarter net income grew to $224.2 million, compared to $168.8 million for the same period last year. Revenues jumped 12 percent to $2.8 million. More details about EchoStar's second quarter results should come out today during an investor conference call between executives and analysts.