<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 12:50:00.000"
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="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: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.10 (069) 12:50:00</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">
FF202606903101250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.702" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.749" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.202" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.272" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="341.863" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.455" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.262" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.417" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.805" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.440" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="147.490" 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="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 235.000 240.000 245.000 250.000 255.000 255.000 265.000 275.000 270.000 273.333 276.667 280.000 285.000 285.000 290.000 290.000 290.000 295.000 292.500 290.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 407.500 410.000 410.000 412.500 415.000 417.500 420.000 420.000 422.500 425.000 425.000 426.667 428.333 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 450.000 452.500 455.000 460.000 460.000 464.066 468.574 473.601 479.242 485.616 492.878 501.225 510.921 522.321 535.919 552.417 572.854
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 54 57 0 0 0 54 57 0 45 57 0 0 54 57 54 57 0 57 51 0 57 54 0 60 63 0 60 60 57 57 0 60 63 63 63 63 60 63 63 63 60 0 0 63 66 0 60 57 63 66 63 57 63 0 63 63 60 66 57 0 0 0 0 0 48 57 63 69 0 60 66 63 60 63 57 60 66 57 63 66 66 66 66 63 66 57 63 66 57 66 66 63 66 60 63 60 60 63 63 60 63 57 60 63 66 0 60 60 0 60 45 51 54 0 45 51 0 0 54 54 48 0 51 48 51 48 45 45 0 45 45 42 48 48 0 45 0 0 48 48 48 45 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 -1.953125 -0.390625 -0.390625 -0.390625 2.734375 0.390625 -0.390625 1.953125 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 1.171875 -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 1.953125 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 -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" >
89.513 90.0 95.0 100.0 105.0 110.0 112.333 114.666 115.0 116.999 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 341.863 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.153 2.771 3.098 3.202 3.08 3.08 3.097 3.202 3.301 3.456 3.606 3.753 3.9 4.048 4.199 4.353 4.511 4.673 4.841 5.014 5.193 5.378 5.569 5.766 5.969 6.178 6.392 6.612 6.836 7.063 7.294 7.528 7.764 8.001 8.239 8.478 8.716 8.954 9.192 9.427 9.662 9.893 10.122 10.347 10.566 10.779 10.982 11.173 11.347 11.498 11.62 11.705 11.747 11.75 11.747 11.733 11.707 11.669 11.621 11.563 11.495 11.418 11.333 11.241 11.141 11.035 10.922 10.805 10.682 10.555 10.424 10.289 10.151 10.011 9.868 9.722 9.576 9.428 9.278 9.128 8.978 8.827 8.676 8.525 8.374 8.224 8.075 7.926 7.779 7.632 7.487 7.343 7.201 7.06 6.92 6.782 6.646 6.512 6.379 6.249 6.12 5.993 5.868 5.745 5.624 5.505 5.388 5.273 5.16 5.049 4.94 4.832 4.727 4.624 4.523 4.424 4.326 4.231 4.137 4.046 3.956 3.868 3.781 3.697 3.614 3.533 3.454 3.376 3.3 3.225 3.152 3.081 3.011 2.943 2.876 2.811 2.747 2.684 2.623 2.563 2.505 2.447 2.391 2.337 2.283 2.231 2.179 2.129 2.081 2.033 1.986 1.94 1.896 1.852 1.809 1.768 1.727 1.687 1.648 1.61 1.573 1.537 1.501 1.466 1.433 1.399 1.367 1.335 1.305 1.274 1.245 1.216 1.188 1.16 1.133 1.107 1.082 1.056 1.032 1.008 0.985 0.962 0.94 0.918 0.897 0.876

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.202" PeakHeight="110.0" Num="3" Error="0.0">
-30.359 12.943 -3.071
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.202" EndFrequency="11.75" PeakHeight="341.863" Num="5" zHalfNm="251.455" Error="4.002">
-187.165 -46.191 9.817 -3.276 1.951
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.999" Depth="0.122"/>
<TopsideChapman PeakHeight="341.863" PeakDensity="1712934.2" PeakScaleHeight="66.44" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
