<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 22:10:00.000"
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: Multiple candidates for F2x 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" >
2026.03.29 (088) 22:10:00</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">
FF202608803292210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.453" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.884" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="443.301" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="377.004" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.234" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.354" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.431" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="169">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 347.500 345.000 345.000 345.600 346.200 346.800 347.400 348.000 348.600 349.200 349.800 350.400 351.000 351.600 352.200 352.800 353.400 354.000 354.600 355.200 355.800 356.400 357.000 357.600 358.200 358.800 359.400 360.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 370.000 370.000 370.000 370.000 375.000 373.333 371.667 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 386.667 388.333 390.000 390.000 390.000 390.000 390.000 390.000 395.000 396.000 397.000 398.000 399.000 400.000 400.000 402.500 405.000 405.000 406.000 407.000 408.000 409.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 421.429 422.857 424.286 425.714 427.143 428.571 430.000 430.000 430.000 435.000 435.000 440.000 437.500 435.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 485.000 487.500 490.000 490.000 495.000 500.000 500.000 502.500 505.000 507.500 510.000 515.000 518.333 521.667 525.000 525.000 529.000 533.000 537.000 541.000 545.000 545.000 545.000 550.000 555.000 559.356 564.242 569.762 576.047 583.268 591.652
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 75 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 0 0 0 0 0 48 51 72 72 0 0 75 72 69 0 0 60 69 63 0 78 75 75 0 75 60 0 0 72 72 72 0 60 0 69 66 72 75 72 0 60 0 0 75 78 0 0 72 72 0 0 0 69 69 51 0 0 0 60 69 51 57 63 0 0 0 0 60 63 51 51 54 66 0 69 57 60 60 0 57 0 0 0 0 57 60 66 63 63 57 57 66 0 51 72 69 72 72 60 60 63 66 66 66 69 57 60 60 57 69 72 66 69 66 69 0 66 0 60 60 0 63 60 0 57 0 60 60 0 0 54 60 0 0 0 0 51 51 51 51 54 51 48 45 45 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 1.171875 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 1.953125 -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 -1.171875 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 2.734375 -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 -0.390625 2.734375
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.443 145.0 150.0 155.0 160.0 165.0 170.0 172.885 175.0 180.0 185.0 190.0 195.0 200.0 204.328 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 443.301 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.325 0.301 0.267 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.235 0.259 0.284 0.308 0.333 0.354 0.367 0.444 0.513 0.583 0.656 0.733 0.817 0.908 1.006 1.115 1.233 1.363 1.505 1.659 1.827 2.008 2.203 2.41 2.631 2.863 3.107 3.362 3.626 3.9 4.182 4.472 4.769 5.072 5.382 5.697 6.017 6.34 6.667 6.997 7.327 7.658 7.987 8.312 8.631 8.941 9.239 9.52 9.778 10.01 10.207 10.365 10.477 10.538 10.55 10.549 10.532 10.495 10.441 10.37 10.284 10.184 10.072 9.948 9.814 9.672 9.521 9.364 9.201 9.033 8.861 8.686 8.508 8.328 8.146 7.964 7.782 7.6 7.419 7.239 7.06 6.882 6.707 6.534 6.363 6.194 6.029 5.866 5.706 5.549 5.395 5.244 5.097 4.953 4.812 4.674 4.539 4.408 4.28 4.155 4.033 3.914 3.799 3.686 3.577 3.47 3.366 3.265 3.167 3.072 2.979 2.889 2.802 2.717 2.634 2.554 2.476 2.401 2.328 2.256 2.187 2.12 2.055 1.992 1.931 1.872 1.814 1.758 1.704 1.652 1.601 1.551 1.503 1.457 1.412 1.368 1.326 1.285 1.245 1.207 1.169 1.133 1.098 1.064 1.031 0.999 0.968 0.938 0.909 0.881 0.853 0.827 0.801 0.776 0.752 0.729 0.706 0.684 0.663 0.642 0.622 0.603 0.584 0.566 0.548 0.531 0.515

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="10.55" PeakHeight="443.301" Num="5" zHalfNm="377.004" Error="5.975">
-225.241 -23.725 11.534 -4.493 2.952
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="94.328" Depth="0.154"/>
<TopsideChapman PeakHeight="443.301" PeakDensity="1380924.4" PeakScaleHeight="49.431" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
