<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 18:50:00.000"
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="1 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, F2 cusps do not match</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) 18:50:00</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">
FF202608603271850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.540" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.491" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.650" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.910" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="107.285" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.883" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="9.671" 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="490.000" 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="2.789" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.887" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.156" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.584" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.367" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="63.707" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.437" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="167.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="175">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 200.714 206.429 212.143 217.857 223.571 229.286 235.000 240.000 240.000 243.333 246.667 250.000 253.333 256.667 260.000 260.000 262.500 265.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 282.500 285.000 285.000 285.000 288.000 291.000 294.000 297.000 300.000 295.000 297.500 300.000 302.500 305.000 306.667 308.333 310.000 310.000 315.000 315.000 315.000 317.500 320.000 325.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 336.667 338.333 340.000 341.667 343.333 345.000 346.667 348.333 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 392.500 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 415.833 416.667 417.500 418.333 419.167 420.000 425.000 425.000 425.000 427.500 430.000 427.500 425.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 437.500 440.000 442.500 445.000 445.000 447.500 450.000 452.500 455.000 455.000 455.000 455.000 455.000 455.000 465.000 465.000 470.000 470.000 472.500 475.000 475.000 475.000 485.000 480.000 482.500 485.000 490.000 490.000 495.000 500.000 505.135 510.657 516.613 523.056 530.049 537.663 545.987 555.124 565.200 576.367 588.813 602.770 618.532 636.473 657.077
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 0 0 0 54 57 63 0 0 0 0 0 0 0 0 57 48 0 0 54 60 54 60 0 63 66 0 51 0 0 0 0 0 0 0 0 0 0 0 63 57 66 66 66 0 66 63 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 66 57 0 66 60 63 69 69 66 69 72 72 72 78 75 75 78 81 78 81 81 78 81 81 78 81 69 75 78 69 72 75 66 72 69 63 66 51 57 66 0 0 0 0 0 69 54 0 63 0 0 0 63 60 60 0 60 0 54 57 0 57 54 48 0 0 0 54 54 0 48 0 42 48 54 51 51 42 45 45 45 45 0 42 0 0 45 45 0 0 45 42 0 0 0 0 0 0 0 0 0 48 0 0 0 48 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.171875 2.734375 1.171875 -1.171875 -2.734375 -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 -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 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 -1.171875 2.734375 -1.953125 -0.390625 0.390625 1.953125 2.734375 0.390625 0.390625 0.390625 -1.953125 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
107.285 108.250 109.371 110.714 112.402 114.708
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 60 0 60
</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
</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" >
90.0 95.0 99.883 100.0 104.066 105.0 108.25 110.0 112.433 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.887 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.511 2.91 2.91 2.782 2.782 2.782 2.836 2.91 2.972 3.095 3.221 3.35 3.481 3.615 3.751 3.89 4.032 4.176 4.323 4.473 4.626 4.781 4.94 5.101 5.266 5.433 5.604 5.778 5.955 6.136 6.32 6.508 6.699 6.894 7.092 7.294 7.5 7.709 7.922 8.138 8.358 8.581 8.806 9.035 9.265 9.498 9.731 9.965 10.199 10.43 10.659 10.883 11.101 11.311 11.509 11.695 11.865 12.016 12.145 12.25 12.329 12.379 12.4 12.4 12.397 12.383 12.36 12.328 12.288 12.239 12.182 12.117 12.046 11.968 11.885 11.795 11.7 11.6 11.495 11.386 11.274 11.157 11.038 10.915 10.79 10.662 10.533 10.401 10.268 10.134 9.998 9.862 9.724 9.586 9.448 9.31 9.171 9.033 8.895 8.757 8.619 8.483 8.347 8.211 8.077 7.943 7.811 7.679 7.549 7.42 7.292 7.166 7.041 6.917 6.795 6.674 6.555 6.437 6.321 6.206 6.093 5.982 5.872 5.763 5.656 5.551 5.448 5.346 5.245 5.146 5.049 4.953 4.859 4.767 4.675 4.586 4.498 4.411 4.326 4.243 4.161 4.08 4.001 3.923 3.847 3.772 3.698 3.625 3.554 3.485 3.416 3.349 3.283 3.218 3.155 3.092 3.031 2.971 2.912 2.855 2.798 2.743 2.688 2.635 2.582 2.531 2.48 2.431 2.382 2.335 2.288 2.242 2.198 2.154 2.11 2.068 2.027 1.986 1.946 1.907 1.869 1.832 1.795 1.759 1.723 1.689 1.655

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.91" PeakHeight="99.883" Num="3" Error="3.043">
-14.564 6.088 -1.407
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.91" EndFrequency="12.4" PeakHeight="385.887" Num="5" zHalfNm="284.156" Error="5.054">
-231.011 -50.774 8.396 0.158 -0.223
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.55" Depth="0.128"/>
<TopsideChapman PeakHeight="385.887" PeakDensity="1907692.2" PeakScaleHeight="76.437" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
