<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 15:50:00.000"
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="15.0">
<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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, F2 cusps do not match</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" >
2026.10.15 (288) 15:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628810151550009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="8.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.798" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.758" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="415.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="415.000" Name="h`F2" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.344" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="285.029" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="186.730" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.241" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.593" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.293" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.770" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 420.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 455.000 455.000 460.000 467.037 475.456 485.708
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 54 66 69 69 66 66 66 66 60 63 60 66 63 57 0 0
</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 1.953125
</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" >
89.489 90.0 95.0 100.0 105.0 110.0 111.699 113.397 115.0 115.096 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 285.029 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.256 2.903 3.245 3.354 3.231 3.231 3.347 3.354 3.55 3.737 3.921 4.111 4.308 4.514 4.728 4.947 5.168 5.387 5.601 5.807 6.005 6.194 6.375 6.549 6.716 6.876 7.032 7.183 7.33 7.473 7.614 7.752 7.888 8.022 8.153 8.283 8.41 8.533 8.648 8.749 8.822 8.85 8.85 8.845 8.832 8.81 8.78 8.742 8.697 8.645 8.587 8.523 8.454 8.379 8.3 8.217 8.13 8.039 7.945 7.848 7.748 7.646 7.543 7.437 7.33 7.222 7.112 7.002 6.892 6.78 6.669 6.558 6.446 6.335 6.224 6.114 6.004 5.894 5.786 5.678 5.572 5.466 5.361 5.258 5.156 5.055 4.955 4.856 4.759 4.663 4.569 4.475 4.384 4.293 4.205 4.117 4.031 3.947 3.864 3.782 3.702 3.623 3.546 3.47 3.395 3.322 3.251 3.18 3.111 3.044 2.977 2.912 2.849 2.786 2.725 2.665 2.606 2.549 2.492 2.437 2.383 2.33 2.279 2.228 2.178 2.13 2.082 2.036 1.99 1.946 1.902 1.86 1.818 1.777 1.737 1.698 1.66 1.623 1.586 1.55 1.515 1.481 1.448 1.415 1.383 1.352 1.321 1.291 1.262 1.234 1.206 1.178 1.152 1.126 1.1 1.075 1.051 1.027 1.004 0.981 0.959 0.937 0.916 0.895 0.875 0.855 0.835 0.816 0.798 0.78 0.762 0.745 0.728 0.711 0.695 0.679 0.664 0.649 0.634 0.619 0.605 0.592 0.578 0.565 0.552 0.539

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.354" PeakHeight="110.0" Num="3" Error="0.0">
-30.475 13.113 -3.149
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.354" EndFrequency="8.85" PeakHeight="285.029" Num="5" zHalfNm="186.73" Error="5.158">
-150.779 -32.069 19.802 -9.708 2.821
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.096" Depth="0.123"/>
<TopsideChapman PeakHeight="285.029" PeakDensity="971743.2" PeakScaleHeight="67.77" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
