<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.30 (089) 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">
FF202608903301850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="13.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.550" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.655" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.781" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.714" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="296.586" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.584" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.916" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="63.634" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.757" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="193">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 231.875 233.750 235.625 237.500 239.375 241.250 243.125 245.000 245.000 248.333 251.667 255.000 260.000 260.000 262.857 265.714 268.571 271.429 274.286 277.143 280.000 280.000 285.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 323.333 326.667 330.000 330.000 330.000 330.000 335.000 340.000 338.333 336.667 335.000 335.000 338.750 342.500 346.250 350.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 357.500 360.000 365.000 366.250 367.500 368.750 370.000 370.000 371.667 373.333 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 382.500 385.000 386.250 387.500 388.750 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 411.250 412.500 413.750 415.000 415.000 417.500 420.000 422.500 425.000 425.000 425.000 422.500 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 432.500 435.000 436.667 438.333 440.000 440.000 440.000 440.000 440.000 440.000 445.000 446.250 447.500 448.750 450.000 450.000 450.000 455.000 457.500 460.000 455.000 460.000 460.000 465.000 465.000 465.000 468.000 471.000 474.000 477.000 480.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 495.000 496.667 498.333 500.000 505.000 515.000 519.736 524.867 530.446 536.533 543.202 550.540 558.653 567.671 577.753 589.101 601.968 616.681
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 48 0 0 0 0 45 45 48 0 54 57 57 0 0 0 0 54 0 57 60 0 48 60 63 63 60 63 60 60 0 57 60 60 60 63 60 0 0 0 0 66 0 0 0 0 0 0 57 48 0 0 66 66 0 63 63 45 0 0 63 48 0 0 0 51 63 63 0 69 66 63 66 66 63 0 60 54 0 0 0 48 57 0 0 57 60 0 54 0 66 63 57 0 63 0 0 0 54 60 63 48 0 60 48 0 0 63 69 72 63 60 69 0 0 0 54 45 0 54 0 51 0 57 0 63 66 0 63 0 54 60 0 60 0 48 0 0 45 0 0 0 57 60 54 0 0 0 48 0 42 42 0 39 51 51 54 48 54 57 0 0 0 0 45 54 57 51 42 54 45 54 54 0 0 48 48 51 0 0 0 0 0 0 0 0 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 2.734375 -0.390625 1.171875 -2.734375 -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 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 -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 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 2.734375 1.953125 0.390625 0.390625 0.390625 1.953125 1.953125 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 1.953125 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 1.953125 0.390625 -0.390625 2.734375 2.734375 -0.390625 -1.953125 2.734375 -2.734375 -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" >
89.584 90.0 95.0 100.0 105.0 110.0 114.222 115.0 118.444 120.0 122.666 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.714 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.869 2.407 2.691 2.781 2.659 2.659 2.659 2.704 2.781 2.836 2.956 3.078 3.202 3.329 3.459 3.593 3.731 3.872 4.018 4.169 4.324 4.485 4.65 4.821 4.996 5.178 5.364 5.556 5.753 5.956 6.163 6.376 6.593 6.815 7.042 7.273 7.508 7.747 7.99 8.236 8.486 8.738 8.994 9.252 9.512 9.774 10.037 10.302 10.567 10.833 11.097 11.359 11.617 11.87 12.114 12.347 12.565 12.761 12.929 13.063 13.154 13.197 13.2 13.197 13.181 13.151 13.109 13.055 12.989 12.914 12.828 12.733 12.629 12.518 12.399 12.274 12.143 12.006 11.864 11.717 11.567 11.413 11.256 11.096 10.934 10.77 10.605 10.438 10.27 10.102 9.933 9.764 9.596 9.427 9.26 9.092 8.926 8.761 8.597 8.435 8.273 8.114 7.956 7.8 7.645 7.493 7.342 7.193 7.047 6.902 6.76 6.62 6.482 6.346 6.213 6.081 5.952 5.825 5.701 5.578 5.458 5.34 5.224 5.11 4.999 4.889 4.782 4.677 4.574 4.473 4.374 4.277 4.181 4.088 3.997 3.908 3.82 3.735 3.651 3.569 3.488 3.41 3.333 3.257 3.184 3.112 3.041 2.972 2.905 2.839 2.774 2.711 2.649 2.589 2.53 2.472 2.415 2.36 2.306 2.253 2.202 2.151 2.102 2.054 2.007 1.961 1.916 1.872 1.829 1.787 1.746 1.706 1.666 1.628 1.591 1.554 1.518 1.483 1.449 1.416 1.383 1.351 1.32 1.29 1.26 1.231

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.781" PeakHeight="110.0" Num="3" Error="0.0">
-30.0 12.419 -2.835
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.781" EndFrequency="13.2" PeakHeight="386.714" Num="5" zHalfNm="296.586" Error="3.955">
-214.936 -58.199 11.33 -3.349 1.106
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.666" Depth="0.122"/>
<TopsideChapman PeakHeight="386.714" PeakDensity="2161786.5" PeakScaleHeight="66.757" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
