<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.19 (078) 22:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803192210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.473" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="556.429" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="435.878" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="370.379" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.422" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.847" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.885" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 350.000 350.833 351.667 352.500 353.333 354.167 355.000 355.000 360.000 360.000 360.000 361.000 362.000 363.000 364.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 381.000 382.000 383.000 384.000 385.000 380.000 381.500 383.000 384.500 386.000 387.500 389.000 390.500 392.000 393.500 395.000 395.000 395.000 396.250 397.500 398.750 400.000 401.250 402.500 403.750 405.000 405.000 405.000 407.500 410.000 410.000 412.500 415.000 415.000 415.000 415.000 416.667 418.333 420.000 421.667 423.333 425.000 426.667 428.333 430.000 430.000 430.000 435.000 435.000 436.250 437.500 438.750 440.000 440.000 445.000 450.000 450.000 450.000 452.500 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 465.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 485.000 490.000 490.000 495.000 495.000 497.500 500.000 505.000 505.000 505.000 508.571 512.143 515.714 519.286 522.857 526.429 530.000 535.000 538.571 542.143 545.714 549.286 552.857 556.429 560.000 565.000 571.636 578.898
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 54 0 0 0 0 0 54 51 54 0 54 0 54 0 0 0 63 63 0 0 0 54 60 0 60 0 0 0 57 60 0 48 0 54 57 57 0 60 0 0 60 0 0 63 0 57 0 0 60 0 0 60 60 63 0 0 57 0 0 51 0 60 45 60 0 60 57 0 54 0 60 57 0 0 0 0 0 54 0 0 51 54 60 45 48 0 0 0 57 57 63 63 69 63 0 63 63 54 66 63 0 51 57 60 60 63 57 60 60 60 60 60 63 63 63 63 0 60 57 60 0 0 0 0 0 0 0 57 57 0 0 0 0 0 0 48 48 48 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 -1.171875 -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 -0.390625 -0.390625 -2.734375 -1.171875 -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 -1.171875 1.171875 -0.390625 -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 2.734375 -0.390625 -2.734375 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -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 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -2.734375 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.166 145.0 150.0 155.0 160.0 165.0 170.0 172.331 175.0 180.0 185.0 190.0 195.0 200.0 203.497 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 435.878 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.265 0.215 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.238 0.263 0.287 0.312 0.337 0.354 0.376 0.45 0.528 0.612 0.705 0.806 0.917 1.039 1.172 1.316 1.471 1.637 1.814 2.001 2.198 2.405 2.621 2.845 3.079 3.32 3.569 3.825 4.089 4.361 4.639 4.924 5.215 5.512 5.816 6.124 6.438 6.755 7.077 7.4 7.725 8.049 8.37 8.685 8.993 9.287 9.564 9.817 10.04 10.226 10.369 10.461 10.499 10.5 10.493 10.466 10.42 10.356 10.277 10.182 10.075 9.955 9.825 9.685 9.536 9.381 9.219 9.051 8.879 8.704 8.525 8.345 8.163 7.98 7.797 7.613 7.431 7.249 7.068 6.89 6.713 6.538 6.365 6.195 6.028 5.864 5.702 5.544 5.389 5.237 5.088 4.942 4.8 4.661 4.526 4.393 4.264 4.138 4.016 3.896 3.78 3.667 3.556 3.449 3.345 3.244 3.145 3.05 2.957 2.866 2.778 2.693 2.611 2.53 2.452 2.377 2.303 2.232 2.163 2.096 2.031 1.968 1.907 1.848 1.79 1.734 1.68 1.628 1.577 1.528 1.48 1.434 1.389 1.346 1.304 1.263 1.223 1.185 1.148 1.112 1.077 1.043 1.011 0.979 0.948 0.919 0.89 0.862 0.835 0.809 0.783 0.759 0.735 0.712 0.689 0.668 0.647 0.626 0.607 0.588 0.569 0.551 0.534 0.517 0.501 0.485 0.47

</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="10.5" PeakHeight="435.878" Num="5" zHalfNm="370.379" Error="3.818">
-222.755 -21.636 16.217 -5.867 1.66
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.497" Depth="0.154"/>
<TopsideChapman PeakHeight="435.878" PeakDensity="1367866.0" PeakScaleHeight="48.885" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
