<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 19:30:00.000"
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" >
2026.03.13 (072) 19:30:00</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">
FF202607203131930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.558" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.270" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="2.544" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.709" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.046" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.681" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.998" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.084" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.850" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 271.667 273.333 275.000 276.250 277.500 278.750 280.000 281.250 282.500 283.750 285.000 286.250 287.500 288.750 290.000 290.000 293.333 296.667 300.000 300.000 300.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 312.500 315.000 317.500 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 332.500 335.000 330.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 348.333 351.667 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 524.792 530.141 536.150 542.949 550.704 559.633 570.025
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 54 0 0 54 0 0 0 0 51 0 0 0 0 0 0 63 60 57 0 66 69 69 66 69 69 66 54 72 69 0 0 0 66 66 66 60 63 66 63 66 0 60 66 51 60 63 66 57 0 66 63 0 0 63 66 54 63 66 57 63 51 60 63 54 63 66 60 66 54 63 66 60 66 57 66 66 66 69 63 66 60 66 66 63 54 63 51 60 66 54 60 69 60 63 69 66 66 66 63 66 57 60 69 63 66 66 60 63 63 60 0 57 60 54 57 54 45 54 48 54 51 48 51 51 48 45 42 42 0 0 0 0 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 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 -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 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 0.390625 1.171875 -1.171875 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" >
89.63 90.0 95.0 100.0 105.0 110.0 115.0 115.364 120.0 120.729 125.0 126.093 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.709 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.708 2.203 2.462 2.544 2.436 2.42 2.42 2.42 2.519 2.544 2.663 2.811 2.956 3.102 3.25 3.402 3.558 3.718 3.883 4.054 4.229 4.409 4.594 4.782 4.973 5.168 5.364 5.561 5.76 5.959 6.158 6.356 6.555 6.753 6.95 7.147 7.343 7.539 7.734 7.928 8.123 8.317 8.511 8.705 8.9 9.094 9.289 9.484 9.679 9.874 10.068 10.26 10.447 10.626 10.79 10.926 11.019 11.05 11.05 11.043 11.025 10.995 10.954 10.904 10.844 10.775 10.699 10.614 10.523 10.425 10.321 10.212 10.097 9.979 9.856 9.729 9.6 9.467 9.332 9.195 9.057 8.917 8.775 8.633 8.49 8.347 8.204 8.061 7.918 7.775 7.633 7.492 7.352 7.213 7.075 6.938 6.802 6.668 6.535 6.404 6.275 6.147 6.021 5.896 5.774 5.653 5.534 5.417 5.302 5.189 5.078 4.969 4.861 4.756 4.652 4.55 4.451 4.353 4.256 4.162 4.07 3.979 3.89 3.803 3.718 3.635 3.553 3.473 3.394 3.317 3.242 3.169 3.097 3.026 2.957 2.889 2.823 2.759 2.696 2.634 2.573 2.514 2.456 2.4 2.344 2.29 2.237 2.186 2.135 2.086 2.038 1.99 1.944 1.899 1.855 1.812 1.77 1.729 1.689 1.649 1.611 1.573 1.537 1.501 1.466 1.432 1.399 1.366 1.334 1.303 1.273 1.243 1.214 1.186 1.158 1.131 1.104 1.079 1.053 1.029 1.005 0.981 0.958 0.936 0.914 0.893

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.544" PeakHeight="110.0" Num="3" Error="0.0">
-29.762 12.078 -2.686
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.544" EndFrequency="11.05" PeakHeight="364.709" Num="5" zHalfNm="272.046" Error="2.783">
-199.47 -56.855 24.159 -9.069 2.619
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.093" Depth="0.124"/>
<TopsideChapman PeakHeight="364.709" PeakDensity="1514919.4" PeakScaleHeight="65.85" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
