<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 20:10:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="14.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.31 (304) 20:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202630410312010009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.567" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.440" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.804" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="372.795" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.176" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.449" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="121.761" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.045" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.191" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 401.667 403.333 405.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 438.750 442.500 446.250 450.000 450.000 450.000 450.000 452.500 455.000 455.000 457.500 460.000 460.000 460.000 465.000 465.000 465.000 465.000 470.000 470.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 517.500 520.000 526.250 532.500 538.750 545.000 554.226 565.253
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 63 0 54 0 69 66 51 57 0 66 60 69 72 0 63 66 69 60 0 0 0 57 0 66 72 54 66 66 57 63 0 69 57 0 63 0 51 57 63 66 69 66 63 60 0 60 60 60 0 60 57 60 60 60 63 60 63 57 57 60 57 0 57 0 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="46">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 115.000 125.000 125.455 125.909 126.364 126.818 127.273 127.727 128.182 128.636 129.091 129.545 130.000 130.000 130.000 130.000 130.000 130.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 69 0 72 0 0 0 63 0 0 66 0 66 0 0 0 0 0 66 0 0 0 0 0 0 0 0 0 66 0 0 0 69 0 0 69 72 0 0 0 0 66 66 0 69
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.821 90.0 95.0 100.0 105.0 110.0 115.0 119.33 120.0 125.0 128.66 130.0 135.0 137.99 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.795 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.208 1.562 1.746 1.804 1.765 1.667 1.667 1.667 1.667 1.687 1.76 1.804 1.869 2.026 2.182 2.343 2.513 2.694 2.888 3.096 3.32 3.559 3.81 4.072 4.341 4.613 4.886 5.158 5.427 5.692 5.953 6.21 6.463 6.712 6.957 7.2 7.439 7.676 7.911 8.145 8.377 8.608 8.838 9.068 9.298 9.528 9.758 9.988 10.22 10.452 10.684 10.916 11.148 11.376 11.599 11.81 11.999 12.149 12.236 12.25 12.248 12.234 12.204 12.161 12.105 12.036 11.956 11.865 11.764 11.655 11.537 11.412 11.279 11.141 10.997 10.848 10.695 10.538 10.378 10.215 10.05 9.882 9.714 9.544 9.374 9.203 9.032 8.861 8.691 8.521 8.353 8.185 8.019 7.854 7.69 7.529 7.369 7.211 7.055 6.901 6.75 6.6 6.453 6.308 6.166 6.026 5.889 5.753 5.621 5.491 5.363 5.238 5.115 4.994 4.876 4.761 4.647 4.537 4.428 4.322 4.218 4.116 4.017 3.92 3.825 3.732 3.641 3.552 3.465 3.38 3.297 3.216 3.137 3.06 2.985 2.911 2.839 2.769 2.701 2.634 2.568 2.505 2.442 2.382 2.322 2.265 2.208 2.153 2.1 2.047 1.996 1.946 1.898 1.85 1.804 1.759 1.715 1.672 1.63 1.589 1.549 1.51 1.473 1.436 1.4 1.365 1.33 1.297 1.264 1.233 1.202 1.171 1.142 1.113 1.085 1.058 1.031 1.005 0.98 0.956 0.931 0.908 0.885 0.863 0.841 0.82

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.804" PeakHeight="110.0" Num="3" Error="0.0">
-28.741 10.683 -2.121
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.804" EndFrequency="12.25" PeakHeight="372.795" Num="5" zHalfNm="286.176" Error="4.043">
-209.266 -44.572 29.996 -15.203 4.24
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.99" Depth="0.137"/>
<TopsideChapman PeakHeight="372.795" PeakDensity="1861817.6" PeakScaleHeight="61.191" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
