天基导弹预警系统是否可以用于预警巡航导弹？

SBIRS, considered one of the nation’s highest priority space programs, is designed to provide global, persistent, infrared surveillance capabilities to meet 21st century demands in four national security mission areas:

Missile Warning
SBIRS will provide reliable, unambiguous, timely and accurate warning for theater and strategic missile launches to the President of the United States, the Secretary of Defense, Combatant Commanders, and other users

Missile Defense
The system will deliver critical information supporting the effective operation of missile defense systems against national and theater threats
---------------------------------------------------------------------------------------------------------
上文节选自洛克希德马丁公司对SBIRS系统的介绍，似乎更侧重于弹道导弹预警，但在下面的论文中，是这么说的：“美国天基红外系统（SBIRS）中的高轨道卫星（HEO）不仅配备了短波和中波红外探测器，而且还为每颗卫星配备了宽视场短波红外传感器和可见光跟踪传感器，使其具有透过大气层对巡航导弹尾焰进行探测的能力”。（摘自飞航导弹《巡航导弹防御现状与发展趋势分析》一文）。那么当前的技术水平已经支持天基平台预警巡航导弹了吗？天基平台预警巡航导弹的难点又在哪里呢？SBIRS, considered one of the nation’s highest priority space programs, is designed to provide global, persistent, infrared surveillance capabilities to meet 21st century demands in four national security mission areas:

Missile Warning
SBIRS will provide reliable, unambiguous, timely and accurate warning for theater and strategic missile launches to the President of the United States, the Secretary of Defense, Combatant Commanders, and other users

Missile Defense
The system will deliver critical information supporting the effective operation of missile defense systems against national and theater threats
---------------------------------------------------------------------------------------------------------
上文节选自洛克希德马丁公司对SBIRS系统的介绍，似乎更侧重于弹道导弹预警，但在下面的论文中，是这么说的：“美国天基红外系统（SBIRS）中的高轨道卫星（HEO）不仅配备了短波和中波红外探测器，而且还为每颗卫星配备了宽视场短波红外传感器和可见光跟踪传感器，使其具有透过大气层对巡航导弹尾焰进行探测的能力”。（摘自飞航导弹《巡航导弹防御现状与发展趋势分析》一文）。那么当前的技术水平已经支持天基平台预警巡航导弹了吗？天基平台预警巡航导弹的难点又在哪里呢？