<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 19:10:00.000"
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 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.01 (060) 19:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003011910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.515" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.313" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.150" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="95.604" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.540" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.718" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" 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="2.713" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.745" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.263" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.637" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="70.772" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.896" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="165.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="179">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 240.000 245.000 246.250 247.500 248.750 250.000 253.333 256.667 260.000 255.000 260.000 260.000 260.000 260.000 262.500 265.000 270.000 271.667 273.333 275.000 276.667 278.333 280.000 281.667 283.333 285.000 285.000 286.250 287.500 288.750 290.000 295.000 295.000 295.000 297.500 300.000 302.500 305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 342.500 345.000 345.000 347.500 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 357.500 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 415.000 416.250 417.500 418.750 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 431.250 432.500 433.750 435.000 436.667 438.333 440.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 450.000 455.000 460.000 465.000 465.000 465.000 470.000 470.000 475.000 478.333 481.667 485.000 490.000 495.000 500.000 505.000 507.500 510.000 515.000 520.000 520.000 527.500 535.000 540.000 545.000 552.530 561.063 570.814 582.064 595.186 610.692 629.295 652.026 680.431
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 51 54 0 0 0 57 0 0 45 54 54 0 54 51 0 57 57 0 0 0 0 0 0 57 0 54 57 0 0 0 60 60 63 60 0 60 0 63 0 0 0 0 57 0 57 63 60 60 0 60 63 60 0 63 0 63 57 48 66 63 63 63 66 66 63 66 69 0 63 66 0 54 63 63 69 57 63 63 69 66 63 69 54 60 66 69 57 63 69 69 60 66 69 72 72 69 57 63 69 57 63 69 72 63 66 54 69 66 63 66 60 66 51 63 60 45 0 0 0 45 51 54 0 57 54 57 60 54 0 0 0 57 0 0 57 45 0 54 45 51 54 51 0 0 54 48 0 51 57 51 54 0 0 54 0 0 0 45 0 57 54 54 48 0 51 51 51 48 0 48 51 48 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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 -2.734375 0.390625 1.953125 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 -2.734375 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.604 96.299 97.044 97.845 98.711 99.654 100.686 101.828 103.106 104.559 106.246 108.268 110.808 114.277 119.973
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 0 54 54 0 0 0 0 0 0 0 51 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 -2.734375 -1.953125 -0.390625 -0.390625 2.734375 -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" >
88.591 90.0 95.0 99.54 100.0 104.082 105.0 108.623 110.0 113.165 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.745 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.383 2.588 2.86 2.859 2.731 2.731 2.731 2.77 2.86 2.909 3.04 3.17 3.299 3.431 3.564 3.7 3.839 3.983 4.131 4.283 4.441 4.605 4.774 4.949 5.13 5.318 5.512 5.713 5.919 6.132 6.35 6.573 6.801 7.033 7.269 7.508 7.75 7.993 8.238 8.483 8.729 8.975 9.22 9.465 9.707 9.948 10.185 10.42 10.651 10.877 11.099 11.314 11.522 11.721 11.91 12.088 12.253 12.402 12.533 12.645 12.734 12.799 12.838 12.85 12.85 12.845 12.83 12.806 12.774 12.733 12.685 12.629 12.566 12.496 12.42 12.338 12.251 12.158 12.061 11.959 11.853 11.743 11.629 11.513 11.393 11.27 11.146 11.019 10.89 10.759 10.627 10.493 10.359 10.224 10.088 9.951 9.814 9.677 9.539 9.402 9.265 9.128 8.992 8.856 8.721 8.586 8.452 8.319 8.187 8.056 7.926 7.797 7.67 7.543 7.418 7.294 7.172 7.05 6.93 6.812 6.695 6.579 6.465 6.353 6.241 6.132 6.024 5.917 5.812 5.708 5.606 5.505 5.406 5.309 5.213 5.118 5.025 4.933 4.843 4.754 4.667 4.581 4.497 4.413 4.332 4.251 4.172 4.095 4.019 3.944 3.87 3.797 3.726 3.656 3.588 3.52 3.454 3.389 3.325 3.262 3.2 3.14 3.08 3.022 2.964 2.908 2.853 2.799 2.745 2.693 2.642 2.591 2.542 2.493 2.446 2.399 2.353 2.308 2.264 2.221 2.178 2.136 2.095 2.055 2.016 1.977 1.939 1.902

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.86" PeakHeight="99.54" Num="3" Error="0.952">
-16.118 6.713 -1.544
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.86" EndFrequency="12.85" PeakHeight="384.745" Num="5" zHalfNm="277.263" Error="3.316">
-237.884 -38.712 6.249 -3.015 1.782
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.625" Depth="0.129"/>
<TopsideChapman PeakHeight="384.745" PeakDensity="2048666.2" PeakScaleHeight="79.896" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
