<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 21:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 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" >
2026.03.03 (062) 21:20:00</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">
FF202606203032120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.353" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.119" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="0.933" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="431.467" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.150" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.273" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="132.613" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.664" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.034" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.800" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="167">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 303.333 306.667 310.000 310.000 308.750 307.500 306.250 305.000 310.000 311.500 313.000 314.500 316.000 317.500 319.000 320.500 322.000 323.500 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 327.000 329.000 331.000 333.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 346.667 348.333 350.000 350.000 350.000 351.250 352.500 353.750 355.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 367.500 370.000 375.000 375.000 375.000 380.000 380.000 381.429 382.857 384.286 385.714 387.143 388.571 390.000 390.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 407.143 409.286 411.429 413.571 415.714 417.857 420.000 420.000 425.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 465.000 467.500 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 495.000 495.000 500.000 505.000 505.000 510.000 510.000 513.125 516.250 519.375 522.500 525.625 528.750 531.875 535.000 535.000 545.000 545.000 550.000 552.500 555.000 560.000 560.000 565.000 570.000 570.000 572.500 575.000 585.000 587.500 590.000 595.000 600.000 605.000 613.033 622.788 634.886 650.286
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 69 66 66 63 54 54 57 0 0 0 66 0 0 0 60 75 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 0 0 0 60 63 51 0 0 66 0 75 78 0 78 0 66 0 48 69 0 63 0 72 0 72 75 60 57 60 0 0 63 0 63 57 0 60 54 63 0 57 0 48 0 0 63 69 69 75 63 66 54 63 69 72 69 0 66 0 66 0 0 66 60 66 57 66 51 63 69 60 66 72 63 69 69 63 57 60 54 63 69 66 72 69 75 75 75 66 69 60 57 51 48 63 63 63 57 69 63 66 0 60 0 0 63 0 0 60 60 54 63 57 54 57 54 54 51 48 45 0 0 48 0 51 54 51 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 1.171875 -1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 60 0 0 0 54 60 60 60 0 0 0 0 0 0 54 57 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 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 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.349 95.0 100.0 105.0 110.0 115.0 120.0 125.0 128.695 130.0 135.0 140.0 145.0 147.391 150.0 155.0 160.0 165.0 166.086 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 431.467 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.621 0.809 0.903 0.933 0.917 0.869 0.783 0.687 0.687 0.687 0.687 0.687 0.687 0.721 0.787 0.853 0.919 0.933 1.029 1.131 1.229 1.326 1.427 1.534 1.648 1.771 1.905 2.051 2.213 2.39 2.584 2.795 3.02 3.258 3.505 3.759 4.015 4.271 4.527 4.78 5.031 5.278 5.523 5.765 6.003 6.24 6.474 6.706 6.936 7.164 7.392 7.617 7.842 8.066 8.289 8.51 8.731 8.95 9.168 9.384 9.598 9.808 10.013 10.212 10.402 10.579 10.74 10.879 10.989 11.064 11.098 11.1 11.097 11.082 11.056 11.02 10.973 10.916 10.851 10.777 10.695 10.606 10.51 10.408 10.301 10.188 10.071 9.95 9.824 9.696 9.564 9.43 9.293 9.155 9.015 8.874 8.732 8.59 8.446 8.303 8.159 8.016 7.873 7.731 7.589 7.448 7.308 7.169 7.031 6.895 6.76 6.626 6.494 6.364 6.235 6.108 5.982 5.859 5.737 5.617 5.499 5.383 5.269 5.156 5.046 4.937 4.83 4.726 4.623 4.522 4.423 4.325 4.23 4.137 4.045 3.955 3.867 3.781 3.696 3.613 3.532 3.452 3.375 3.298 3.224 3.151 3.079 3.009 2.941 2.874 2.808 2.744 2.681 2.62 2.56 2.501 2.444 2.388 2.333 2.279 2.227 2.175 2.125 2.076 2.028 1.981 1.935 1.891 1.847 1.804 1.762 1.722 1.682 1.643 1.605 1.567 1.531 1.495 1.461 1.427 1.393 1.361 1.329 1.298 1.268 1.239

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.933" PeakHeight="110.0" Num="3" Error="0.0">
-26.19 7.673 -1.134
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.933" EndFrequency="11.1" PeakHeight="431.467" Num="5" zHalfNm="340.15" Error="5.991">
-249.473 -29.222 21.869 -15.027 6.472
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="56.086" Depth="0.246"/>
<TopsideChapman PeakHeight="431.467" PeakDensity="1528660.0" PeakScaleHeight="66.034" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
