<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 22:30:00.000"
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, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.02.27 (058) 22:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605802272230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.343" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.854" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="600.000" 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="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="464.660" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="386.188" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.697" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.719" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.683" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.626" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="118.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 375.000 370.000 373.333 376.667 380.000 380.000 380.000 380.000 381.111 382.222 383.333 384.444 385.556 386.667 387.778 388.889 390.000 390.000 390.000 390.000 391.250 392.500 393.750 395.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 437.000 439.000 441.000 443.000 445.000 450.000 450.000 450.000 450.000 450.000 450.000 460.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 480.000 485.000 485.000 487.500 490.000 500.000 500.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 520.000 520.000 525.000 530.000 535.000 535.000 540.000 545.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 595.000 600.000 608.622 618.926 631.459 647.031
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 63 66 0 0 60 0 66 66 0 0 0 0 0 0 0 0 60 69 66 66 0 0 0 63 57 60 48 0 0 60 69 57 0 0 63 60 63 60 0 66 66 63 66 63 66 48 54 69 72 60 69 69 63 0 0 0 0 66 54 57 63 0 66 63 57 45 69 63 69 63 57 66 69 60 63 57 63 63 66 0 63 57 60 66 63 66 63 54 60 48 69 69 72 75 72 66 69 63 63 66 66 63 63 57 57 63 69 69 60 60 54 54 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 -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 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 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -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 -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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.076 145.0 150.0 155.0 160.0 165.0 170.0 174.153 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.229 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 464.66 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.327 0.304 0.271 0.225 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.228 0.252 0.276 0.3 0.324 0.348 0.354 0.401 0.462 0.527 0.595 0.668 0.747 0.832 0.925 1.025 1.132 1.248 1.372 1.505 1.646 1.795 1.951 2.115 2.287 2.465 2.65 2.842 3.039 3.242 3.45 3.663 3.881 4.103 4.329 4.559 4.792 5.028 5.266 5.507 5.749 5.992 6.236 6.478 6.719 6.956 7.19 7.418 7.638 7.848 8.047 8.231 8.398 8.546 8.671 8.771 8.843 8.887 8.9 8.9 8.893 8.874 8.844 8.803 8.753 8.693 8.625 8.549 8.466 8.376 8.28 8.179 8.074 7.964 7.85 7.733 7.613 7.491 7.366 7.24 7.113 6.984 6.855 6.726 6.596 6.467 6.338 6.209 6.081 5.954 5.827 5.702 5.579 5.456 5.335 5.216 5.098 4.982 4.867 4.754 4.644 4.535 4.428 4.322 4.219 4.118 4.019 3.921 3.826 3.732 3.64 3.551 3.463 3.377 3.293 3.211 3.131 3.052 2.975 2.9 2.827 2.755 2.685 2.617 2.55 2.485 2.422 2.36 2.299 2.24 2.183 2.127 2.072 2.018 1.966 1.916 1.866 1.818 1.771 1.725 1.68 1.636 1.594 1.552 1.512 1.473 1.434 1.397 1.361 1.325 1.29 1.257 1.224 1.192 1.161 1.131 1.101 1.072 1.044 1.017 0.99 0.964 0.939 0.914 0.89 0.867 0.844

</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="8.9" PeakHeight="464.66" Num="5" zHalfNm="386.188" Error="3.661">
-251.505 -16.336 12.32 -4.68 1.77
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.229" Depth="0.154"/>
<TopsideChapman PeakHeight="464.66" PeakDensity="982754.3" PeakScaleHeight="58.626" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
