<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 13:50:00.000"
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 1 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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) 13:50:00</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">
FF202608603271350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.875" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.372" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.377" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="301.053" 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="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="527.436" 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="3.348" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.341" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="379.030" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="180.764" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.702" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.611" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.351" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="64.314" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="62.799" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="82.263" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="185.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.130" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
301.053 302.105 303.158 304.211 305.263 306.316 307.368 308.421 309.474 310.526 311.579 312.632 313.684 314.737 315.789 316.842 317.895 318.947 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 332.000 334.000 336.000 338.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 357.000 359.000 361.000 363.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 447.000 449.000 451.000 453.000 455.000 457.500 460.000 460.000 460.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 470.000 470.000 472.500 475.000 480.000 480.000 480.000 482.500 485.000 487.500 490.000 492.500 495.000 495.000 497.500 500.000 500.000 500.000 504.167 508.333 512.500 516.667 520.833 523.957 527.436 531.333 535.729 540.726 546.457 553.097 560.879 570.126 581.296 595.057 612.430 635.052 665.722
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 54 51 51 48 54 57 0 54 54 0 0 54 48 0 0 0 0 57 54 57 54 54 54 51 0 54 0 0 57 51 60 54 60 54 57 54 54 51 48 57 57 63 60 57 63 60 66 66 60 66 63 66 66 57 63 51 57 0 0 0 0 54 0 0 0 57 0 54 51 45 0 51 51 0 51 45 0 51 51 54 51 0 54 0 51 42 48 54 0 51 54 54 0 0 0 48 0 48 48 45 45 45 0 48 48 48 48 48 48 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 1.953125 0.390625 1.953125 -0.390625 -1.171875 0.390625 0.390625 -2.734375 2.734375 -0.390625 -2.734375 0.390625 -0.390625 0.390625 -1.171875 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 -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 -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 1.171875 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 1.953125 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 2.734375 -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="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 236.250 242.500 248.750 255.000 262.500 270.000 282.500 295.000 300.000 300.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 45 0 48 0 45 0 45 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -1.171875 0.390625 2.734375 -0.390625 0.390625 0.390625 -1.171875 1.171875 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" >
89.49 90.0 95.0 100.0 105.0 110.0 111.724 113.448 115.0 115.172 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.764 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.03 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.252 2.897 3.239 3.348 3.225 3.225 3.336 3.348 3.574 3.783 3.995 4.204 4.399 4.572 4.725 4.863 4.99 5.107 5.216 5.313 5.371 5.372 5.489 5.642 5.81 5.992 6.182 6.378 6.576 6.773 6.967 7.157 7.344 7.527 7.707 7.885 8.06 8.234 8.407 8.579 8.751 8.923 9.096 9.269 9.444 9.619 9.797 9.975 10.155 10.336 10.517 10.698 10.877 11.052 11.22 11.378 11.522 11.646 11.748 11.821 11.864 11.875 11.875 11.869 11.855 11.833 11.804 11.767 11.724 11.674 11.618 11.556 11.489 11.416 11.338 11.256 11.17 11.08 10.985 10.888 10.787 10.684 10.577 10.468 10.357 10.244 10.13 10.013 9.895 9.776 9.656 9.535 9.413 9.291 9.168 9.045 8.922 8.799 8.676 8.553 8.43 8.308 8.186 8.064 7.943 7.823 7.704 7.585 7.467 7.351 7.235 7.12 7.006 6.893 6.782 6.671 6.562 6.454 6.347 6.241 6.137 6.034 5.932 5.831 5.732 5.634 5.537 5.442 5.348 5.255 5.164 5.074 4.985 4.898 4.811 4.727 4.643 4.561 4.48 4.4 4.321 4.244 4.168 4.093 4.02 3.947 3.876 3.806 3.737 3.67 3.603 3.537 3.473 3.41 3.348 3.286 3.226 3.167 3.109 3.052 2.996 2.941 2.887 2.834 2.782 2.73 2.68 2.631 2.582 2.534 2.487 2.441 2.396 2.352 2.308 2.265 2.223 2.182 2.141 2.101 2.062 2.024 1.986 1.949 1.913 1.877 1.842

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.348" PeakHeight="110.0" Num="3" Error="0.0">
-30.471 13.107 -3.146
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.348" EndFrequency="5.372" PeakHeight="180.764" Num="5" Error="0.0">
-57.619 -12.679 6.778 -3.033 0.961
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.372" EndFrequency="11.875" PeakHeight="379.03" Num="5" zHalfNm="264.702" Error="5.93">
-166.677 -39.422 9.906 -0.283 -1.79
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.172" Depth="0.123"/>
<TopsideChapman PeakHeight="379.03" PeakDensity="1749573.5" PeakScaleHeight="82.263" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
