<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 20:10:00.000"
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="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x 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" >
2026.03.27 (086) 20:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603272010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.612" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.914" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="2.087" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.098" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="289.962" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.687" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.502" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.162" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.726" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="198">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 248.333 246.667 245.000 245.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 256.250 257.500 258.750 260.000 261.250 262.500 263.750 265.000 265.000 266.250 267.500 268.750 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 285.000 287.222 289.444 291.667 293.889 296.111 298.333 300.556 302.778 305.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 321.000 322.000 323.000 324.000 325.000 330.000 331.667 333.333 335.000 335.000 335.000 335.000 335.000 335.000 340.000 341.667 343.333 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 410.000 415.000 412.500 410.000 415.000 420.000 420.000 422.500 425.000 425.000 425.000 430.000 430.000 430.000 432.143 434.286 436.429 438.571 440.714 442.857 445.000 440.000 447.500 455.000 455.000 455.000 460.000 465.000 465.000 470.000 473.000 476.000 479.000 482.000 485.000 490.000 495.000 500.000 505.000 510.000 516.292 523.183 530.762 539.138 548.444 558.843 570.540 583.794
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 54 54 54 0 0 60 54 54 0 60 63 63 0 0 0 60 0 0 0 0 54 0 0 0 0 0 63 0 63 63 0 66 0 63 0 66 0 66 63 57 0 66 63 57 54 0 0 0 0 0 0 0 0 57 69 66 69 72 63 66 51 72 72 69 69 72 72 69 69 72 0 0 45 51 72 66 0 0 57 60 66 69 0 69 66 51 0 63 69 69 72 66 69 75 60 66 72 51 75 66 69 75 0 63 72 54 72 75 69 0 69 72 66 0 69 69 72 69 72 72 72 72 69 69 72 72 72 69 69 72 0 63 0 0 0 66 69 66 0 66 57 57 66 0 54 0 63 48 0 60 60 48 54 0 45 54 60 48 51 57 0 0 57 0 0 0 54 0 0 48 54 54 0 51 54 57 0 0 54 0 54 57 0 0 57 54 54 54 42 51 0 45 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.736 90.0 95.0 100.0 105.0 110.0 115.0 117.732 120.0 125.0 125.465 130.0 133.197 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.098 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.399 1.807 2.02 2.087 2.033 1.956 1.956 1.956 1.956 2.033 2.087 2.124 2.229 2.337 2.449 2.565 2.687 2.815 2.95 3.094 3.246 3.409 3.582 3.767 3.965 4.175 4.399 4.635 4.884 5.143 5.413 5.691 5.975 6.264 6.557 6.852 7.148 7.444 7.74 8.035 8.329 8.621 8.912 9.2 9.487 9.771 10.053 10.331 10.606 10.875 11.139 11.394 11.639 11.869 12.08 12.266 12.418 12.528 12.589 12.6 12.599 12.584 12.555 12.51 12.452 12.381 12.298 12.204 12.1 11.987 11.864 11.734 11.597 11.453 11.304 11.149 10.99 10.827 10.661 10.492 10.32 10.147 9.972 9.796 9.619 9.442 9.265 9.088 8.912 8.736 8.562 8.388 8.216 8.045 7.876 7.709 7.544 7.381 7.219 7.061 6.904 6.75 6.598 6.449 6.302 6.157 6.016 5.876 5.74 5.605 5.474 5.345 5.218 5.094 4.973 4.854 4.738 4.624 4.512 4.403 4.296 4.192 4.09 3.99 3.892 3.797 3.704 3.612 3.523 3.436 3.352 3.269 3.188 3.109 3.031 2.956 2.882 2.81 2.74 2.672 2.605 2.54 2.476 2.414 2.354 2.295 2.237 2.181 2.126 2.073 2.021 1.97 1.92 1.872 1.825 1.779 1.734 1.69 1.647 1.606 1.565 1.526 1.487 1.45 1.413 1.377 1.342 1.308 1.275 1.243 1.212 1.181 1.151 1.122 1.093 1.066 1.039 1.012 0.987 0.962 0.937 0.914 0.89 0.868 0.846 0.824

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.087" PeakHeight="110.0" Num="3" Error="0.0">
-29.197 11.291 -2.358
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.087" EndFrequency="12.6" PeakHeight="373.098" Num="5" zHalfNm="289.962" Error="4.746">
-203.128 -41.094 9.307 -7.57 2.584
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.197" Depth="0.131"/>
<TopsideChapman PeakHeight="373.098" PeakDensity="1969727.0" PeakScaleHeight="60.726" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
