<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-31 -090 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: 60% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.31 (090) 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">
FF202609003312210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.360" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.311" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="561.667" 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="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="465.705" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="387.668" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.318" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.892" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.342" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="118.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 386.250 387.500 388.750 390.000 390.000 392.500 395.000 395.714 396.429 397.143 397.857 398.571 399.286 400.000 400.000 401.250 402.500 403.750 405.000 405.000 407.500 410.000 410.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 421.667 423.333 425.000 425.000 426.000 427.000 428.000 429.000 430.000 430.000 435.000 435.000 435.000 435.000 437.500 440.000 435.000 440.000 440.000 442.500 445.000 445.000 446.667 448.333 450.000 455.000 455.000 455.000 460.000 460.000 462.500 465.000 465.000 465.000 467.500 470.000 475.000 475.000 480.000 480.000 480.000 482.500 485.000 490.000 491.667 493.333 495.000 495.000 498.333 501.667 505.000 505.000 505.000 505.000 510.000 515.000 515.000 520.000 521.667 523.333 525.000 530.000 535.000 538.333 541.667 545.000 547.500 550.000 555.000 558.333 561.667 565.000 570.000 575.000 580.000 585.000 590.000 596.988 604.604 612.936 622.092 632.199 643.414
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 63 0 0 60 60 0 0 57 54 0 51 63 66 69 57 0 60 51 63 0 0 0 51 57 0 60 0 0 48 0 0 0 63 57 0 0 0 66 66 0 66 63 63 0 63 0 0 0 0 0 0 54 66 0 0 51 0 72 72 60 0 66 81 57 75 78 81 75 69 78 75 0 51 72 69 69 72 69 72 45 63 0 72 0 69 57 66 57 63 69 0 66 57 0 0 54 60 0 0 57 54 54 51 54 45 51 48 0 0 45 0 48 0 0 51 0 57 60 0 0 57 57 0 0 0 57 54 51 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 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 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 2.734375 -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 -1.171875 -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 -1.171875 -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 0.390625 -1.953125 -1.171875 -1.953125 0.390625 -0.390625 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.171875
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.493 145.0 150.0 155.0 160.0 165.0 170.0 172.985 175.0 180.0 185.0 190.0 195.0 200.0 204.478 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 465.705 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.326 0.302 0.267 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.234 0.259 0.283 0.308 0.332 0.354 0.36 0.421 0.486 0.555 0.631 0.713 0.802 0.9 1.007 1.122 1.247 1.382 1.526 1.679 1.842 2.014 2.194 2.383 2.58 2.785 2.997 3.216 3.442 3.674 3.913 4.157 4.407 4.663 4.923 5.188 5.457 5.73 6.006 6.285 6.566 6.849 7.132 7.415 7.696 7.974 8.248 8.516 8.775 9.023 9.258 9.477 9.677 9.854 10.005 10.128 10.219 10.277 10.3 10.3 10.295 10.275 10.243 10.198 10.141 10.073 9.996 9.909 9.814 9.711 9.601 9.484 9.362 9.235 9.103 8.967 8.828 8.686 8.542 8.396 8.248 8.098 7.948 7.798 7.647 7.497 7.346 7.197 7.048 6.9 6.753 6.607 6.463 6.321 6.18 6.041 5.904 5.768 5.635 5.504 5.375 5.249 5.124 5.002 4.882 4.764 4.648 4.535 4.424 4.316 4.209 4.105 4.003 3.903 3.806 3.71 3.617 3.526 3.436 3.349 3.264 3.181 3.1 3.021 2.944 2.868 2.794 2.723 2.652 2.584 2.517 2.452 2.389 2.327 2.266 2.208 2.15 2.094 2.04 1.987 1.935 1.884 1.835 1.787 1.74 1.695 1.651 1.607 1.565 1.524 1.484 1.445 1.407 1.37 1.334 1.299 1.265 1.232 1.2 1.168 1.137 1.107 1.078 1.05 1.022 0.995 0.969

</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="10.3" PeakHeight="465.705" Num="5" zHalfNm="387.668" Error="3.65">
-255.484 -15.138 12.964 -5.142 1.573
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="94.478" Depth="0.154"/>
<TopsideChapman PeakHeight="465.705" PeakDensity="1316253.1" PeakScaleHeight="58.342" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
