<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 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" >
2026.03.11 (070) 19:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202607003111930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.448" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.845" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" 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="34" Val="105.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="2.549" 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="384.747" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.599" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.681" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="163.334" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.994" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.222" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="185.060" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 270.000 270.000 275.000 276.000 277.000 278.000 279.000 280.000 280.000 282.500 285.000 287.500 290.000 292.500 295.000 297.500 300.000 302.500 305.000 307.500 310.000 312.500 315.000 315.000 316.667 318.333 320.000 321.667 323.333 325.000 325.000 327.500 330.000 332.188 334.375 336.563 338.750 340.938 343.125 345.313 347.500 349.688 351.875 354.063 356.250 358.438 360.625 362.813 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 485.000 490.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 530.000 535.000 545.000 550.000 555.000 563.243 572.343 582.440 593.707 606.362 620.676 637.000 655.788 677.644
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 48 0 63 57 0 0 0 0 66 57 0 0 0 45 0 57 0 0 0 0 0 0 0 54 54 0 0 0 0 0 57 60 0 63 0 0 0 0 51 0 0 0 0 0 0 0 0 54 0 54 63 60 63 69 63 66 57 66 60 66 57 63 69 63 54 63 54 66 60 69 69 69 66 69 69 66 72 69 69 69 66 63 66 66 66 66 69 69 63 69 66 63 57 66 63 60 63 66 63 63 63 63 63 63 57 60 60 60 60 57 57 57 54 51 48 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 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.953125 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 110.000 110.000 110.000 110.000 109.375 108.750 108.125 107.500 106.875 106.250 105.625 105.000 105.000 105.000 105.000 105.000 105.000 107.500 110.000 115.000 114.000 113.000 112.000 111.000 110.000 109.000 108.000 107.000 106.000 105.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 108.750 107.500 106.250 105.000 105.000 105.000 110.000 110.000 110.000 110.000 107.500 105.000 105.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 69 66 69 66 0 0 0 54 0 60 0 0 57 0 60 60 60 0 0 57 0 0 0 0 0 0 57 0 0 0 63 60 0 0 0 60 0 60 0 0 0 0 0 57 0 0 0 0 0 48 51 57 0 0 0 0 54 57 54 51 0 48 0 0 51 48 45 60 0 0 0 0 0 60
</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 1.953125 -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 -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 -2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -2.734375 1.953125 -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" >
89.63 90.0 95.0 100.0 105.0 110.0 115.0 115.34 120.0 120.679 125.0 126.019 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.747 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.712 2.207 2.466 2.549 2.44 2.425 2.425 2.425 2.525 2.549 2.661 2.797 2.932 3.069 3.208 3.352 3.501 3.655 3.815 3.98 4.151 4.328 4.508 4.693 4.879 5.067 5.256 5.445 5.632 5.818 6.002 6.184 6.364 6.541 6.715 6.887 7.057 7.224 7.389 7.551 7.711 7.87 8.026 8.18 8.332 8.482 8.63 8.776 8.919 9.059 9.196 9.329 9.457 9.58 9.696 9.804 9.902 9.987 10.056 10.108 10.14 10.15 10.15 10.146 10.137 10.121 10.099 10.072 10.04 10.002 9.96 9.913 9.861 9.806 9.747 9.684 9.617 9.547 9.475 9.399 9.321 9.24 9.157 9.072 8.985 8.896 8.806 8.714 8.621 8.527 8.431 8.335 8.238 8.141 8.042 7.944 7.845 7.746 7.647 7.547 7.448 7.349 7.25 7.151 7.052 6.954 6.856 6.759 6.662 6.566 6.471 6.376 6.282 6.188 6.096 6.004 5.913 5.823 5.733 5.645 5.557 5.47 5.385 5.3 5.216 5.133 5.051 4.971 4.891 4.812 4.734 4.657 4.581 4.506 4.432 4.359 4.288 4.217 4.147 4.078 4.01 3.943 3.877 3.812 3.748 3.685 3.623 3.561 3.501 3.442 3.383 3.326 3.269 3.213 3.158 3.104 3.051 2.999 2.947 2.896 2.846 2.797 2.749 2.702 2.655 2.609 2.564 2.519 2.476 2.433 2.39 2.349 2.308 2.268 2.228 2.189 2.151 2.113 2.077 2.04 2.005 1.969 1.935 1.901 1.868 1.835

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.549" PeakHeight="110.0" Num="3" Error="0.0">
-29.767 12.086 -2.689
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.549" EndFrequency="10.15" PeakHeight="384.747" Num="5" zHalfNm="263.599" Error="3.747">
-238.458 -31.911 17.831 -8.991 2.801
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.019" Depth="0.124"/>
<TopsideChapman PeakHeight="384.747" PeakDensity="1278194.8" PeakScaleHeight="87.222" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
