The price of laser pointer is not the only factor

The blue laser pointer will be more expensive than the green laser pointer. 
Improve the user's requirements. User spacecraft and relay satellite distance of 42000km is far greater than the distance of the user spacecraft and the ground. Requires the user spacecraft to increase the transmit power, high-gain narrow-beam antenna. TDRSS position is fixed, but all in low-orbit user control by the system, so once the TDRSS by interference or destruction of the whole system would grind to the future development trend of the paralyzed 1.2.3 Data Relay Satellite System. Due to the complexity of systems technology, all countries before the formal networking in key technologies, satellite tower load test, the system is running way mutual networking requirements. With the explosive growth of information flows. The price of laser pointer is not the only factor.
These actions are to enhance the indices and parameters of laser pointer
All members in the communications and data transfer, mutual benefit, especially in the space program is now interoperable design. The research work in general in two phases, the first stage is mainly to solve the interoperability problem of the S-band; the second stage to solve the interoperability problem of the Ka-band. In order to build interoperable systems, the tripartite track signal tracking and capture method, communication link analysis and frequency of use for a long and extensive coordination, technically basic agreement. S-band interoperable link parameters for technical issues and recommendations to solve earlier; on the Ka-band space network interoperability issues, coordination is more complex, before the last three parties agreed to use to link 23 GHz return link using the 25 ~ 27GHz. laser pointer is from the appropriate the supplier.
Can be used in atmospheric laser communication channel condition is not good in the atmospheric channel conditions are good, that is, the bit error rate is small, error correction performance of Turbo codes is far better than the RS (15, 9) code, and I using LDPC codes, such as in a small to moderate weather, correction maintained at 10 ? 4 and RS (15, 9) code and LDPC codes error correction system bit error rate in 10 ? 6 Turbo code error correction The performance of the system reached 10 ? 7. Can be drawn: the Turbo code suitable for the system bit error rate in the 10 ? 4 occasions, but for the error rate of less than 10 ? 3 atmospheric laser systems, error correction capability is generally not as good as the RS (30, 10). The minimum bit error rate of the system when the fine weather, the best communication quality. The coordinating of laser pointer has to be made.