<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 13:10:00.000"
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="1 2 0 1 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, 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) 13:10:00</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">
FF202607103121310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="33" >
<URSI ID="00" Val="9.625" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.523" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.434" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.367" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="321.667" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.216" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.469" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.282" 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="420.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.261" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.300" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="358.709" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="187.648" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.472" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.348" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="142.262" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="71.240" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.947" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.519" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="203.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.110" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="82">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
321.667 323.333 325.000 325.000 328.333 331.667 335.000 335.000 335.000 335.000 340.000 340.000 342.500 345.000 345.000 345.000 346.250 347.500 348.750 350.000 355.000 355.000 356.667 358.333 360.000 360.000 370.000 370.000 375.000 375.000 377.500 380.000 385.000 385.000 387.500 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 565.000 570.000 580.000 590.000 600.000 605.000 615.000 627.338 641.387
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 51 48 0 0 51 51 51 48 54 54 51 54 54 54 0 0 0 54 57 57 0 0 60 0 48 54 51 60 0 60 51 60 0 63 60 63 66 63 66 66 63 63 63 60 63 60 60 57 63 63 66 63 63 63 63 63 63 63 60 57 57 57 54 54 51 51 54 57 57 57 57 57 57 51 54 48 54 54 54 48
</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 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="21">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 220.000 225.000 230.000 235.000 243.333 251.667 260.000 265.000 275.000 279.500 284.000 288.500 293.000 297.500 302.000 306.500 311.000 315.500 320.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 48 48 45 0 0 48 48 51 0 0 0 0 45 0 0 0 0 48
</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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 3.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.216 106.540 108.206 110.486
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 97.469 99.554 100.0 101.639 103.724 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 187.648 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.709 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.157 3.36 3.234 3.234 3.234 3.36 3.406 3.57 3.729 3.891 4.057 4.221 4.376 4.518 4.649 4.768 4.879 4.984 5.085 5.184 5.282 5.383 5.488 5.523 5.587 5.721 5.854 5.99 6.129 6.272 6.42 6.572 6.728 6.886 7.044 7.2 7.352 7.5 7.643 7.779 7.91 8.036 8.157 8.273 8.386 8.495 8.601 8.705 8.806 8.905 9.003 9.099 9.195 9.289 9.381 9.47 9.551 9.609 9.625 9.625 9.621 9.611 9.596 9.576 9.551 9.521 9.487 9.448 9.406 9.36 9.31 9.256 9.199 9.14 9.077 9.011 8.943 8.873 8.8 8.725 8.649 8.57 8.49 8.408 8.325 8.241 8.156 8.07 7.982 7.894 7.806 7.716 7.627 7.537 7.446 7.356 7.265 7.174 7.084 6.993 6.902 6.812 6.722 6.632 6.543 6.453 6.365 6.277 6.189 6.102 6.016 5.93 5.845 5.76 5.676 5.593 5.511 5.429 5.349 5.269 5.189 5.111 5.034 4.957 4.881 4.806 4.732 4.659 4.586 4.515 4.444 4.375 4.306 4.238 4.171 4.105 4.039 3.975 3.911 3.848 3.787 3.726 3.666 3.606 3.548 3.49 3.433 3.378 3.322 3.268 3.215 3.162 3.11 3.059 3.008 2.959 2.91 2.862 2.814 2.768 2.722 2.677 2.632 2.588 2.545 2.503 2.461 2.42 2.38 2.34 2.301 2.262 2.224 2.187 2.15 2.114 2.078 2.043 2.009 1.975 1.942 1.909 1.877 1.845 1.814 1.783 1.753 1.724

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.36" PeakHeight="97.469" Num="3" Error="2.151">
-11.098 4.777 -1.148
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.36" EndFrequency="5.523" PeakHeight="187.648" Num="5" Error="0.0">
-66.114 -26.71 12.958 -5.498 1.44
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.523" EndFrequency="9.625" PeakHeight="358.709" Num="5" zHalfNm="232.472" Error="3.515">
-140.136 -42.879 18.729 -9.031 2.256
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.255" Depth="0.126"/>
<TopsideChapman PeakHeight="358.709" PeakDensity="1149387.4" PeakScaleHeight="90.519" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
