EE/Meteo 477, Fall 2010
HW #4 (partial solutions)
1) Liquid water is fairly absorptive at 19 GHz whereas ice is not. However, if I have 5m spheres, one made
of ice the other of water, the water sphere has a much higher backscatter cross-section. Why?
With
EE/Meteo 477 (Fall 2010)
HW #4 (Due Monday 20 September)
1) Liquid water is fairly absorptive at 19 GHz whereas ice is not. However, if I have 5m spheres,
one made of ice the other of water, the water sphere has a much higher backscatter cross-section.
Wh
EE/Meteo 477
Fall 2010
HW #2 (Due 3 September)
1) Consider the period of the Earth's rotation. Odd as it may seem at first, it is NOT equal to
24 hours. What is it? Explain.
2) A radar pulse is transmitted from the ground at an angle of 60 degrees from z
EE/Meteo 477,
Fall 2010
HW #3 (partial solutions)
(1) Find at least one absorption line for either SF6 or CF4. Why are these gases of interest?
Sulfur hexafluoride, SF6, is a colorless, odorless gas used as an insulator in electrical equipment as well as
EE/Meteo 477, Fall 2010
HW #2 (partial solutions)
1) period of Earths rotation
24 hours is the time between identical views of the sun; but we have also done 1/365.25 of an orbit of the sun in that
time in addition to earth rotation, which therefore has a
EE/Meteo 477
Fall 2010
HW #10 (Due 10 December)
1) Problems from the text: Ch. 10, #3 & Ch. 11, #1.
2) You are given a telescope with a 5 mrad full-width field-of-view (FOV) and a laser transmitter with a 1 mrad
full-width beam divergence (assume sharp cu
Chapter 3
Solution to Problems
1. The telemetry system of a geostationary communications satellite samples 100 sensors on the
spacecraft in sequence. Each sample is transmitted to earth as an eight-bit word in a TDM
frame. An additional 200 bits are added
Chapter 4
Solution to Problems
Question #1.
A C-band earth station has an antenna with a transmit gain of 54 dB. The transmitter output
power is set to 100 W at a frequency of 6.100 GHz. The signal is received by a satellite at a
distance of 37,500 km by
Review of E&M and Waves
http:/www.firstpr.com.au/slinky/video/
B
A
http:/www.cco.caltech.edu/~phys1/java/phys1/EField/EField.html
Gedanken w/ Moving Charge
Assume you have simple devices
for measuring the electric and
magnetic fields. What do you
observe
Remote Sensing Platforms
http:/en.wikipedia.org/wi
ki/Northrop_Grumman_
RQ-4_Global_Hawk
Satellite Orbits
Kepler
1
r1
all based on
observations
(Tyco Brahe)
2b
r2
r1 r2 2a
2a
2
t
t
3
Newton
Area swept
out in t is
constant
or V faster closer
T~a
Gm1m 2
F
2
EE/Meteo 477, Fall 2016
HW #2 (partial solutions)
1) Which is more costly, launching a satellite into a sun-synchronous or a low-inclination tropical orbit?
Why? (Note: assume similar eccentricities and apogees).
Sun-synch. Have to launch against spin of
EE/Meteo 477
Fall 2016
HW #5
Partial Solutions
1) Consider coiled burners on an electric stove. When turned on, they glow "Red Hot."
Estimate the temperature of these coils. (Note: Coppers melting point is 1357 K).
The red emission is in a tail of the Pla
EE / Meteo 477, Fall 2016
HW #3 (partial solutions)
(1) Calculate and plot the reflection coefficient as a function of the angle of incidence for a half space with index of
refraction equal to n = 1.7 and for n = 9 . In both cases, the incident half space
EE/Meteo 477, Fall 2016
HW #4 (partial solutions)
1)
As seen from the Earth, what solid angle does the moon subtend? The sun? As seen from the sun, what
solid angle does the Earth subtend?
The solid angle for the sun of 6.8 x 10-5 steradians and 6.4 x 10-
EE/Meteo 477
Fall 2016, HW #6 partial solutions
1)
The AVHRR instrument has a channel centered at 3.9 microns (an atmospheric window). A satellite image of a cloud
generally appears colder than its surroundings at night but warmer than its surroundings by
Resolution,
Errors
and NOISE
The Four Resolutions of Remote Sensing
Spectral
Spatial
Temporal
Radiometric
Example: Spatial Resolution (Marlborough, CT)
Various resolution
images w/ impervious
overlay
Accuracy
vs.
Precision
In general
=
M
2
n e j 4 Rn /
EE/Meteo 477
Fall 2016
HW #1 (Due 26 August)
1) Print out a satellite picture of the place where you grew up
(and tell me where it is!).
2) What is your favorite proposed mission from the NRC
report (note: this report is posted on the CANVAS
website). Sin
EE/Meteo 477
Fall 2016
HW #1 (partial solutions)
1) Print out a satellite picture of the place where you grew up
(and tell me where it is!).
2) What is your favorite proposed mission from the NRC report (note: this
report is posted on the CANVASl website)
EE/Meteo 477
Fall 2010
HW #5
Partial Solutions
1) Consider coiled burners on an electric stove. When turned on, they glow "Red Hot."
Estimate the temperature of these coils. (Note: Coppers melting point is 1357 K).
The red emission is in a tail of the Pla
EE/Meteo 477
Fall 2010
HW #9 (Due 19 November)
1) You have a 10 cm radar with 1 msec pulse rep time.
a. Find the unambiguous range and velocity.
b. Assume hydrometeors are moving at 40 m/s toward the radar. What Doppler shift do they
produce and what appa
EE/Meteo 477
Fall 2010
HW #8 (Due 5 November)
1) Two problems from the text: Ch. 7, #3 and #4
2) The refractivity of air is represented by the formula
(m 1) 106 = k1
p 1
e
e
z a + k 2 z w1 + k3 2 z w1 .
T
T
T
Calculate the water vapor partial pressure i
EE/Meteo 477
Fall 2010
HW #8 (partial solutions)
See text
1)
Problems from the text: Ch. 7, #3 and #4.
2)
The refractivity of air is represented by the formula
(m 1) 10 6 = k1
p 1
e
e
z a + k 2 z w1 + k3 2 z w1 .
T
T
T
Calculate the water vapor partial
EE/Meteo 477 Fall 2010
HW #9 (partial solutions)
1)
You have a 10 cm radar with 1 msec pulse rep time.
a.
Find the unambiguous range and velocity.
b.
Assume hydrometeors are moving at 40 m/s toward the radar. What Doppler shift do they produce and what ap
Chapter 6 Solution to Problems
1. You are designing an FDM/FM/FDMA analog link that will occupy 36 MHz of an
INTELSAT VI transponder. The uplink and downlink center frequencies of the occupied band
are 5985.5 MHz and 3760.5 MHz. The distance from the sate
Chapter 7
Solution to Problems
1. Alphanumeric characters are transmitted as 7-bit ASCII words, with a single parity bit
added, over a link with a transmission rate of 9.6 kbps.
a.
How many characters are transmitted each second?
Answer: Each character (a
EE/Meteo 477
Fall 2010
HW #7 (Due 22 October)
1) An imaging question: targets near you appear to move much more rapidly than targets which are
distant (e.g. trees near the side of the road seem to zip by as you are driving, whereas trees near
the horizon
EE/Meteo 477 Fall 2010
HW #7 (partial solutions )
1)
An imaging question: targets near you appear to move much more rapidly than targets which are distant (e.g. trees
near the side of the road seem to zip by as you are driving, whereas trees near the hori
EE/Meteo 477
Fall 2010, HW #6 partial solutions
1)
What is a typical size distribution for Cirrus cloud particles? Cumulus? Stratus? (list all assumptions).
Cloud droplets in cumulus are typically between about 5 and 40 microns in diameter.
Continental cu
EE/Meteo 477
Fall 2010
HW #6 (Due 8 October)
1) What is a typical size distribution for Cirrus cloud particles? Cumulus? Stratus?
(list all assumptions).
2) Explain why there is such a wide variation of salinity at the oceans surface, but such a narrow
ra
EE/Meteo 477
Fall 2010
HW #3 (Due 10 September)
0B
1) Find at least one absorption line for either SF6 or CF4. Why are these gases of interest?
2) Problem from the text: Ch.2, #1.
3) Stand in your living room with all the lights on in the middle of the ni
EE/Meteo 477
Fall 2016
HW #3 (Due 9 Sept.)
0B
1) Plot the reflection coefficient as a function of the angle of incidence for a half space with
index of refraction equal to n = 1.7 and for n = 9 . In both cases, the incident half space
has n = 1 . Consider
EE/Meteo 477
Fall 2016
HW #2 (Due 2 September)
1) Which is more costly, launching a satellite into a sun-synchronous or a low-inclination
tropical orbit? Why? (Note: assume similar eccentricities and apogees).
2) Is 2 m in the microwave, IR, or UV portion