<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 15:10:00.000"
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="18.0">
<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" >
2026.03.12 (071) 15:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607103121510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.572" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.536" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" 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="3.408" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.369" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="347.167" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.587" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.287" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="160.337" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.098" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.053" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 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 8.9 8.95 9.0 9.05 9.1 9.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 307.000 309.000 311.000 313.000 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 333.333 336.667 340.000 340.000 340.000 340.000 340.000 345.000 345.000 347.857 350.714 353.571 356.429 359.286 362.143 365.000 365.000 367.500 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 398.750 402.500 406.250 410.000 415.000 415.000 420.000 425.000 430.000 440.000 445.000 445.000 455.000 460.000 465.000 470.000 480.000 490.000 495.000 500.000 510.000 515.000 525.000 530.000 540.000 545.000 555.000 565.000 575.000 587.338 601.387 617.528 636.267
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 0 0 51 0 54 48 0 0 0 0 51 57 54 0 0 57 51 0 0 48 51 54 54 48 57 54 0 48 0 0 54 0 48 54 0 54 60 0 51 60 54 57 57 51 57 0 0 0 57 57 57 60 60 63 57 57 60 57 57 57 57 57 54 57 57 54 54 57 57 57 54 54 54 54 54 54 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 2.734375 -0.390625 0.390625 -0.390625 0.390625 0.390625 2.734375 0.390625 -2.734375 -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 2.734375 -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>
</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" >
89.482 90.0 95.0 100.0 105.0 110.0 111.475 112.951 114.426 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.167 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.293 2.949 3.297 3.408 3.285 3.285 3.408 3.43 3.593 3.734 3.866 3.995 4.122 4.25 4.379 4.51 4.644 4.782 4.922 5.066 5.213 5.362 5.513 5.665 5.818 5.971 6.123 6.274 6.423 6.57 6.715 6.857 6.997 7.134 7.269 7.401 7.531 7.658 7.783 7.905 8.026 8.144 8.259 8.371 8.481 8.587 8.689 8.786 8.877 8.959 9.03 9.087 9.128 9.148 9.15 9.149 9.143 9.132 9.116 9.096 9.07 9.04 9.006 8.968 8.926 8.881 8.832 8.78 8.724 8.666 8.605 8.541 8.475 8.407 8.337 8.265 8.191 8.115 8.038 7.959 7.879 7.798 7.716 7.634 7.55 7.465 7.381 7.295 7.209 7.123 7.037 6.95 6.863 6.776 6.69 6.603 6.517 6.43 6.344 6.259 6.174 6.089 6.004 5.92 5.837 5.754 5.672 5.59 5.509 5.429 5.349 5.27 5.192 5.114 5.038 4.962 4.887 4.812 4.739 4.666 4.594 4.523 4.453 4.383 4.315 4.247 4.18 4.114 4.049 3.984 3.921 3.858 3.796 3.735 3.675 3.616 3.557 3.5 3.443 3.387 3.332 3.277 3.223 3.171 3.118 3.067 3.017 2.967 2.918 2.87 2.822 2.775 2.729 2.684 2.639 2.595 2.552 2.509 2.467 2.426 2.385 2.345 2.306 2.267 2.229 2.191 2.155 2.118 2.082 2.047 2.013 1.979 1.945 1.912 1.88 1.848 1.817 1.786 1.756 1.726 1.697 1.668 1.639 1.612 1.584 1.557

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.408" PeakHeight="110.0" Num="3" Error="0.0">
-30.512 13.17 -3.176
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.408" EndFrequency="9.15" PeakHeight="347.167" Num="5" zHalfNm="221.587" Error="6.662">
-206.528 -38.269 15.534 -6.593 3.115
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.426" Depth="0.123"/>
<TopsideChapman PeakHeight="347.167" PeakDensity="1038740.7" PeakScaleHeight="90.053" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
